Magnets permanent steel magnets hi-res stock photography and images

An engraving depicting Zenobe Gramme's small hand dynamo for laboratory work. The armature rotated between the poles of a permanent steel magnet. Zenobe Gramme (1826-1901) a Belgian electrical engineer. Dated 19th century Stock Photo

RMRJ95AR–An engraving depicting Zenobe Gramme's small hand dynamo for laboratory work. The armature rotated between the poles of a permanent steel magnet. Zenobe Gramme (1826-1901) a Belgian electrical engineer. Dated 19th century

Electric generator with permanent rotor magnets, exploded view, 3D rendering Stock Photo

RF2JG0B19–Electric generator with permanent rotor magnets, exploded view, 3D rendering

Group of workers and business man at facroty, permanent electro magnets for lifting steel plate, industrial lifting magnets, sheet lifting magnet load Stock Photo

RF2AR76F1–Group of workers and business man at facroty, permanent electro magnets for lifting steel plate, industrial lifting magnets, sheet lifting magnet load

Pair of blue industrial lifting magnets on flat sheet metal surface. Stock Photo

RF2FJNWJM–Pair of blue industrial lifting magnets on flat sheet metal surface.

St. Petersburg, Russia - October 10, 2014: Permanent electro magnets for lifting steel plate, industrial lifting magnets, Sheet lifting magnet loads Stock Photo

RFHXEJJH–St. Petersburg, Russia - October 10, 2014: Permanent electro magnets for lifting steel plate, industrial lifting magnets, Sheet lifting magnet loads

CORTLANDT MAGNETS—Permanent Steel Magnets ments. miAcHINERv ennrctiglar:intd.yttb-i CO. 60Vesey It. New York. WM. D. RUSSELL, scientific american, 1874-10-10 Stock Photo

RM2ABWCCW–CORTLANDT MAGNETS—Permanent Steel Magnets ments. miAcHINERv ennrctiglar:intd.yttb-i CO. 60Vesey It. New York. WM. D. RUSSELL, scientific american, 1874-10-10

Vintage advert for English Steel Corporation Ltd. Stock Photo

RF2E8Y732–Vintage advert for English Steel Corporation Ltd.

Three types of magnets isoalted on white background illustration Stock Vector

RF2E0516X–Three types of magnets isoalted on white background illustration

The principles of light and color: including among other things the harmonic laws of the universe, the etherio-atomic philosophy of force, chromo chemistry, chromo therapeutics, and the general philosophy of the fine forces, together with numerous discoveries and practical applications .. . inary iron ; 2d, magnets mustnecessarily have transverse layers of atoms as can be demon-strated by this atomic law, as well as otherwise. Steel whenonce magnetized remains a permanent magnet because of itstransverse polarizations, while the layers of iron are held trans-versely only when under the electric Stock Photo

RM2AJ3KMA–The principles of light and color: including among other things the harmonic laws of the universe, the etherio-atomic philosophy of force, chromo chemistry, chromo therapeutics, and the general philosophy of the fine forces, together with numerous discoveries and practical applications .. . inary iron ; 2d, magnets mustnecessarily have transverse layers of atoms as can be demon-strated by this atomic law, as well as otherwise. Steel whenonce magnetized remains a permanent magnet because of itstransverse polarizations, while the layers of iron are held trans-versely only when under the electric

Brushless DC motor stator disassembled from computer drive Stock Photo

RMAMT61M–Brushless DC motor stator disassembled from computer drive

RF2JG0B15–Electric generator with permanent rotor magnets, exploded view, 3D rendering

RF2AR76EH–Group of workers and business man at facroty, permanent electro magnets for lifting steel plate, industrial lifting magnets, sheet lifting magnet load

RF2FJYR9B–Pair of blue industrial lifting magnets on flat sheet metal surface.

St. Petersburg, Russia - October 10, 2014: worker moves rectangle powerful permanent magnetic lifter, industrial process for metalworking plant, meta Stock Photo

RFHXEJKB–St. Petersburg, Russia - October 10, 2014: worker moves rectangle powerful permanent magnetic lifter, industrial process for metalworking plant, meta

500 Cash Gifts 100 each 50000 19000 Cash Gifts 50 each 950000 CAUSEWAY& FRIEND STS. BOSTON. Ladies at Home MAGNETS—Permanent Steel Magnets SHINGLE & BARREL MACHINERY. SHINGLES HEADING AND STAVES. ICHARDSON MERIAM & CO. Go. MASS. Cold Rolled Shaftin Machinery. OTIS BROS. 4.t.' CO. 1' .1 OrimnalHarpoonHorsellay pered by Nellie' Process t & merits inPampblets free.p, scientific american, 1875-01-02 Stock Photo

RM2ABWCPH–500 Cash Gifts 100 each 50000 19000 Cash Gifts 50 each 950000 CAUSEWAY& FRIEND STS. BOSTON. Ladies at Home MAGNETS—Permanent Steel Magnets SHINGLE & BARREL MACHINERY. SHINGLES HEADING AND STAVES. ICHARDSON MERIAM & CO. Go. MASS. Cold Rolled Shaftin Machinery. OTIS BROS. 4.t.' CO. 1' .1 OrimnalHarpoonHorsellay pered by Nellie' Process t & merits inPampblets free.p, scientific american, 1875-01-02

Magnetic force magnets pick metallic objects up isoalted on white background illustration Stock Vector

RF2DCKEFY–Magnetic force magnets pick metallic objects up isoalted on white background illustration

Investigation of the properties of chilled cast iron as a material for permanent magnets . AN INVESTIGATION of the PROPERTIESofCHILLED CAST IRON as a MATERIAL for PERMANENT MAGNETS. Not all magnetic substances can become magnetspermanently. Lodestone, steel, and nickel retainthe great part of the magnetism imparted t^ them.Cast iron and many impure qualities of wrought ironalso retain magnetism imperfectly. The softer and purer a specfcmtn of iron is, the morelightly is its residual magnetism retained.It is harder to get the magnetism into steel than intoiron, and its is harder to get the magn Stock Photo

RM2AWTJ6Y–Investigation of the properties of chilled cast iron as a material for permanent magnets . AN INVESTIGATION of the PROPERTIESofCHILLED CAST IRON as a MATERIAL for PERMANENT MAGNETS. Not all magnetic substances can become magnetspermanently. Lodestone, steel, and nickel retainthe great part of the magnetism imparted t^ them.Cast iron and many impure qualities of wrought ironalso retain magnetism imperfectly. The softer and purer a specfcmtn of iron is, the morelightly is its residual magnetism retained.It is harder to get the magnetism into steel than intoiron, and its is harder to get the magn

RMAMT61X–Brushless DC motor stator disassembled from computer drive

RF2JG0B12–Electric generator with permanent rotor magnets, exploded view, 3D rendering

RF2AR76E3–Group of workers and business man at facroty, permanent electro magnets for lifting steel plate, industrial lifting magnets, sheet lifting magnet load

Electric generator gold class Stock Photo

RF2JB5R8G–Electric generator gold class

Small Lathes Engines Slide Rests. &c. Catalogues free. GOODNOW & WIGHTMAN 29 Cor n Boston Mass. SHINGLE & BARREL MACHINERY A Set of 12 Steel Lathe Dogs $ 8.00 FOR STEEP ROOFS. ESTB'D 1856. SAM PIES eCIRCULARS 64 CORTLANDT ST. MAGNETS-Permanent Steel Magnets The American Turbine Water Wheel OTIS' FETY HOlSTING 'MEW & IMPROVED PATTERNS.-MA. To Electro-Platers. Plans Details, scientific american, 1874-09-26 Stock Photo

RM2ABWCBG–Small Lathes Engines Slide Rests. &c. Catalogues free. GOODNOW & WIGHTMAN 29 Cor n Boston Mass. SHINGLE & BARREL MACHINERY A Set of 12 Steel Lathe Dogs $ 8.00 FOR STEEP ROOFS. ESTB'D 1856. SAM PIES eCIRCULARS 64 CORTLANDT ST. MAGNETS-Permanent Steel Magnets The American Turbine Water Wheel OTIS' FETY HOlSTING 'MEW & IMPROVED PATTERNS.-MA. To Electro-Platers. Plans Details, scientific american, 1874-09-26

Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book . gnetic field of three permanent stationary-steel horseshoe magnets.The N -poles of thesemagnets are above andthe S-poles below thecopper disc, and it cutsthe magnetic lines offorce as it revolves. Eddycurrents, ^[ 292, are in-duced in the copper disc,and the reaction of theirmagnetic field tends toretard the rotation. Theamount of this retardingeffect is directly propor-tional to the speed ofrotation. Since theangular force causing thearmature to rotate is di-rectly proportional to t Stock Photo

RM2AN5FFB–Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book . gnetic field of three permanent stationary-steel horseshoe magnets.The N -poles of thesemagnets are above andthe S-poles below thecopper disc, and it cutsthe magnetic lines offorce as it revolves. Eddycurrents, ^[ 292, are in-duced in the copper disc,and the reaction of theirmagnetic field tends toretard the rotation. Theamount of this retardingeffect is directly propor-tional to the speed ofrotation. Since theangular force causing thearmature to rotate is di-rectly proportional to t

Brushless DC motor Disassembled from computer drive Stock Photo

RMAMT51K–Brushless DC motor Disassembled from computer drive

RF2AR76JX–Group of workers and business man at facroty, permanent electro magnets for lifting steel plate, industrial lifting magnets, sheet lifting magnet load

RF2JB5RDD–Electric generator gold class

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RM2ABWBJY–MAGNETS—Permanent Steel Magnets STEAM. BAND SAW AND PATE N LOLD ROLLED SHAFTING. HARRISBURG FOUN DRY AND MACHINE COMPANY. Harrisburg Pa. HINGLE AND BARREL MACHINERY The American Turbine Water Wheel P. 33LAISDELL cfc CO. $5 $20 410?YZ m HAS NO EQUAL FOR VARIETY QUALITY AND ECONOMY OF ITS WORK. tural. Cabinet Carriage and Wagon Works. HORIZONTAL AND UPRIGHT BORING MACHINES SUPERIOR TO ANY IN USE. 871. OF THE SCIENTIFIC AMERICAN. THE BEST MECHANICAL PAPER IN THE WORLD. TERMS. MUNN cfc CO. $7 PARK ROW. NEW YORK, 1874-04-04

Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . STEEL MAGNETS CHARGED 189 venient for charging permanent magnets. A shortsteel bar, if applied like an armature to the polesof an electro-magnet of the U form, will becomestrongly magnetic, the end which was in contactwith the north pole acquiring south polarity. Alonger bar may be charged, by employing the sameprocess that has been described in 251, for touchingby steel magnets. 303. Bars of the U form are most readily mag-netized by drawing them fro Stock Photo

RM2AXEGE6–Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . STEEL MAGNETS CHARGED 189 venient for charging permanent magnets. A shortsteel bar, if applied like an armature to the polesof an electro-magnet of the U form, will becomestrongly magnetic, the end which was in contactwith the north pole acquiring south polarity. Alonger bar may be charged, by employing the sameprocess that has been described in 251, for touchingby steel magnets. 303. Bars of the U form are most readily mag-netized by drawing them fro

RF2AR7698–Group of workers and business man at facroty, permanent electro magnets for lifting steel plate, industrial lifting magnets, sheet lifting magnet load

RF2JB5R6M–Electric generator gold class

THE The American Turbine Water Wheel BLAKE'S PATENT Stone and Ore Breaker Address BLAKE CRUSHER CO. New Haven. Conn. MAGNETS—Permanent Steel Magnets insole. RISDON'S IMPROVED TURBINE. THE Union Iron Mills Pittsburgh Pa. im 4i ? 10 irk.; w Aimmaummum let Metal .10t foOThs 720 72 lbs. AletaInthelE016 WARREN PRE MR WARRANTED FIREPROOF TRADE MARK PATENTED. The best and cheapest Paint in the 721Es. deutfefie Cfrfinder. 37 33arf Mow New York Obi 150000 100000 100000 $2400 The Toll-Gat, scientific american, 1874-08-22 Stock Photo

RM2ABWC88–THE The American Turbine Water Wheel BLAKE'S PATENT Stone and Ore Breaker Address BLAKE CRUSHER CO. New Haven. Conn. MAGNETS—Permanent Steel Magnets insole. RISDON'S IMPROVED TURBINE. THE Union Iron Mills Pittsburgh Pa. im 4i ? 10 irk.; w Aimmaummum let Metal .10t foOThs 720 72 lbs. AletaInthelE016 WARREN PRE MR WARRANTED FIREPROOF TRADE MARK PATENTED. The best and cheapest Paint in the 721Es. deutfefie Cfrfinder. 37 33arf Mow New York Obi 150000 100000 100000 $2400 The Toll-Gat, scientific american, 1874-08-22

Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book . Fig. 11.—Magnetisation by an Electromagnet. beginning at its middle point and following the direction ofthe dotted lines in Fig. 11, stroke on all sides, and then strokethe other half of the bar on the other pole. 16. Making Permanent Steel Magnets.—The artificialmagnets in paragraphs 2 and 11 are called permanent mag-nets because they retain their magnetism permanently, to acertain extent, after magnetisation. Some qualities of steelwhich possess good machine tool properties are not Stock Photo

RM2AN8FF2–Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book . Fig. 11.—Magnetisation by an Electromagnet. beginning at its middle point and following the direction ofthe dotted lines in Fig. 11, stroke on all sides, and then strokethe other half of the bar on the other pole. 16. Making Permanent Steel Magnets.—The artificialmagnets in paragraphs 2 and 11 are called permanent mag-nets because they retain their magnetism permanently, to acertain extent, after magnetisation. Some qualities of steelwhich possess good machine tool properties are not

RF2JB5R70–Electric generator gold class

500 00 Agent and Manager. H. WESLEY PERKINS SCIENTIFIC' ENGRAVER WESTON'S CENTRIFUGAL MACHINES. SAFETY HOISTING Machinery. Ladies at Home E4vis vijION TALLow c1-9 nuBois A MAGNETS—Permanent Steel Magnets The American Turbine Water Wheel Worcester Mass. Niagara Steam Pump. CHAS. B. HARDICK THE JOHN HARDICK Niagara Steam Pump. DROP PRESSE& PATENT Planing and Matching 'MEW & IMPROVED PATTERNSMA OVER 7000 IN USE. BLAKE'S STEAM PUMP FOR STEEP ND FLAT PATENT OLD ROLLED SHAFTING. ation t JONES & LAIIGHLINS. SHIN CIL & BARREL MACHINERY HAS NO EQUAL FOR VARIETY QUALITY AND ECONOMY OF ITS WORK Stock Photo

RM2ABWCG9–500 00 Agent and Manager. H. WESLEY PERKINS SCIENTIFIC' ENGRAVER WESTON'S CENTRIFUGAL MACHINES. SAFETY HOISTING Machinery. Ladies at Home E4vis vijION TALLow c1-9 nuBois A MAGNETS—Permanent Steel Magnets The American Turbine Water Wheel Worcester Mass. Niagara Steam Pump. CHAS. B. HARDICK THE JOHN HARDICK Niagara Steam Pump. DROP PRESSE& PATENT Planing and Matching 'MEW & IMPROVED PATTERNSMA OVER 7000 IN USE. BLAKE'S STEAM PUMP FOR STEEP ND FLAT PATENT OLD ROLLED SHAFTING. ation t JONES & LAIIGHLINS. SHIN CIL & BARREL MACHINERY HAS NO EQUAL FOR VARIETY QUALITY AND ECONOMY OF ITS WORK

. The principles of physics. Fig. 455. difference is a maximum and from the coils that are in thefield of least action, 631. Classes of dynamufsh —Dynamos may be divided intodifferent classes according to the method by which theirfield magnets are excited. Fig. 456 illustrates a magneto-electric machine, where the field magnet is a permanent steelmagnet. This form of machine is seldom used, since a per-manent steel magnet cannot be made as powerful as anelectro-magnet having a soft iron core of equal mass. Fig. 461 illustrates a separately excited dynamo, where thefield magnet ooils receive th Stock Photo

RM2AFPN5A–. The principles of physics. Fig. 455. difference is a maximum and from the coils that are in thefield of least action, 631. Classes of dynamufsh —Dynamos may be divided intodifferent classes according to the method by which theirfield magnets are excited. Fig. 456 illustrates a magneto-electric machine, where the field magnet is a permanent steelmagnet. This form of machine is seldom used, since a per-manent steel magnet cannot be made as powerful as anelectro-magnet having a soft iron core of equal mass. Fig. 461 illustrates a separately excited dynamo, where thefield magnet ooils receive th

RF2JB5R6G–Electric generator gold class

Stator and rotor for electric generator 3D rendering isolated on white background Stock Photo

RF2KG2GRX–Stator and rotor for electric generator 3D rendering isolated on white background

Company MAGNETS—Permanent Steel Magnets TENTH INDUSTRIAL EXHIBITION Mechanics' Institute of San Franoisc AGENTS WANTED. aLASS MOULDS for Fruit Jars Lamps WHIPPLE'S SHINGLE'S HEADING AND STAVES N. F. BURNHAM'S BLAKE'S PATENT Stone and Ore Breaker I > Z '63 THE BE STe MOST ECONOMICAL ENGINE o'cs?' m la '' The HOADLEY PORTABLE STEAM ENGINE. Machinery. OTIS BROS. & C EAGLE FOOT LATHES PATENT Machinists' Tools. 10 DOLLARS DT Model Engines. Castings IMPROVED MACHINERY for STAVE ENGINES AND BOILERS PulleysShaftifig and Hangers a Specialty. CAUSEWAY& FRIEND STS. F 0 STO N. YALE IRON WORKS New Haven Stock Photo

RM2ABWDGN–Company MAGNETS—Permanent Steel Magnets TENTH INDUSTRIAL EXHIBITION Mechanics' Institute of San Franoisc AGENTS WANTED. aLASS MOULDS for Fruit Jars Lamps WHIPPLE'S SHINGLE'S HEADING AND STAVES N. F. BURNHAM'S BLAKE'S PATENT Stone and Ore Breaker I > Z '63 THE BE STe MOST ECONOMICAL ENGINE o'cs?' m la '' The HOADLEY PORTABLE STEAM ENGINE. Machinery. OTIS BROS. & C EAGLE FOOT LATHES PATENT Machinists' Tools. 10 DOLLARS DT Model Engines. Castings IMPROVED MACHINERY for STAVE ENGINES AND BOILERS PulleysShaftifig and Hangers a Specialty. CAUSEWAY& FRIEND STS. F 0 STO N. YALE IRON WORKS New Haven

. Journal of electricity, power, and gas . ts: It is of the utmost im-portance that the strength of the retarding magnetshe as permanent as is possible to make them, since their retarding or dragging effect is proportionalto the square of their magnetic strength. Therefore aslight change in the strength will have an appreciableeffect upon the speed of the disc. Much dependsupon the physical properties of the steel from whichthe magnets are manufactured, and the most rigidinspection, by both chemical and physical analysesshould be made of each lot of steel before it is treatedfor use as meter m Stock Photo

RM2CE6BCP–. Journal of electricity, power, and gas . ts: It is of the utmost im-portance that the strength of the retarding magnetshe as permanent as is possible to make them, since their retarding or dragging effect is proportionalto the square of their magnetic strength. Therefore aslight change in the strength will have an appreciableeffect upon the speed of the disc. Much dependsupon the physical properties of the steel from whichthe magnets are manufactured, and the most rigidinspection, by both chemical and physical analysesshould be made of each lot of steel before it is treatedfor use as meter m

RF2KG2GRB–Stator and rotor for electric generator 3D rendering isolated on white background

Dovetailing Machine Battle Creek Mich Catalogue for 1875 FREE' FOOT LATHES 815 and uewards.-Keystone WORCESTER FREE INSTITUTE. It GOLDEN HARVEST FOR A G EN T S MAGNETS—Permanent Steel Magnets YALE IRON WORKS New Haven Conn. AGENTS WANTED. IMPROVED MACHINERY for STAVE MACHINERY. IRON & WOOD WORKING MACHINERY Cold Rolled Shafting. NIAGARA STEAM PUMP PIERCE WELL AUGER r TENTH INDUSTRIAL EXHIBITION Mechanics' Institute of San Francisco. BIGELOW New Haven Conn. STEVENS' MITRE BOX Inside Page 75 cents a line. PLANING AND MATCHING BENTEL MARCEDANT & CO. BLAKE'S PATENT Model Engines. Castings BRADLEY Stock Photo

RM2ABWDE7–Dovetailing Machine Battle Creek Mich Catalogue for 1875 FREE' FOOT LATHES 815 and uewards.-Keystone WORCESTER FREE INSTITUTE. It GOLDEN HARVEST FOR A G EN T S MAGNETS—Permanent Steel Magnets YALE IRON WORKS New Haven Conn. AGENTS WANTED. IMPROVED MACHINERY for STAVE MACHINERY. IRON & WOOD WORKING MACHINERY Cold Rolled Shafting. NIAGARA STEAM PUMP PIERCE WELL AUGER r TENTH INDUSTRIAL EXHIBITION Mechanics' Institute of San Francisco. BIGELOW New Haven Conn. STEVENS' MITRE BOX Inside Page 75 cents a line. PLANING AND MATCHING BENTEL MARCEDANT & CO. BLAKE'S PATENT Model Engines. Castings BRADLEY

. Journal of electricity . For lift- ing bars or irregular masses of steel, for separatingiion particles from mixtures such as ores, for attract-ing and releasing the vibrating arms of telegraphsounders, buzzers, and electric bells, the ability to letgo is as valuable as the ability to pull. Electro-magnets are often operated from a distance, as in thecontrol of lamps and elevator motors and in sig-naling. Furthermore, electro-magnets can be made muchstronger than permanent magnets of the same sizeand weight, and their strength can be varied at will.Hence they are used in nearly all generators Stock Photo

RM2CHKP4A–. Journal of electricity . For lift- ing bars or irregular masses of steel, for separatingiion particles from mixtures such as ores, for attract-ing and releasing the vibrating arms of telegraphsounders, buzzers, and electric bells, the ability to letgo is as valuable as the ability to pull. Electro-magnets are often operated from a distance, as in thecontrol of lamps and elevator motors and in sig-naling. Furthermore, electro-magnets can be made muchstronger than permanent magnets of the same sizeand weight, and their strength can be varied at will.Hence they are used in nearly all generators

Rotor for electric generator 3D illustration isolated on white background Stock Photo

RF2KG2GR0–Rotor for electric generator 3D illustration isolated on white background

Harrisburg Pa. H. C. B. can also furnish HENRY CAREY BAIRD WOODWORTH PLANERS BUTTON-HOLE WORKER. Milling Machines. MAGNETS-Permanent Steel Magnets GEO. W. REAR & CO. STEAM BAND SAW AND P'A'T'UN'T LOLD ROLLED SHAFTING. WOODBURY'S PATENT Planin g and Matehinp LASS OULDS for Fruit Jars Lamps BLAKE'S PATENT Stone and Ore Breaker 1874. and 1875 Catalogues Free. prices to the Manufacturers. VANDUZEN TIFT 402 L 2d M CIS C INN ATI. To Eleetro-Platers. IIINGLE AND BARREL MACHINERY Wheel P. BLAISDELL & 00. Worcester Mass. LATHE &MORSE TOOL CO. MACHINISTS' TOOLS Machinery Sturtevant Blowers. Cold Rolled Stock Photo

RM2ABWBKH–Harrisburg Pa. H. C. B. can also furnish HENRY CAREY BAIRD WOODWORTH PLANERS BUTTON-HOLE WORKER. Milling Machines. MAGNETS-Permanent Steel Magnets GEO. W. REAR & CO. STEAM BAND SAW AND P'A'T'UN'T LOLD ROLLED SHAFTING. WOODBURY'S PATENT Planin g and Matehinp LASS OULDS for Fruit Jars Lamps BLAKE'S PATENT Stone and Ore Breaker 1874. and 1875 Catalogues Free. prices to the Manufacturers. VANDUZEN TIFT 402 L 2d M CIS C INN ATI. To Eleetro-Platers. IIINGLE AND BARREL MACHINERY Wheel P. BLAISDELL & 00. Worcester Mass. LATHE &MORSE TOOL CO. MACHINISTS' TOOLS Machinery Sturtevant Blowers. Cold Rolled

. Amateur radio : how and why of wireless with complete instructions on operation of receiving outfits . cturers,accordingly, make the cores permanent mag-nets by making them of steel, thus always ex-erting a pull on the metal diaphragm, but notenough to pull it to the magnets. (SeeFig. 6.) When the feeble radio current arrives atthe telephone all the energy is used in mag-nifying the attraction that the magnet exertson the diaphragm. This diaphragm is an ex-ceedingly sensitive piece of the phonemechanism. It takes very little energy tomove it. Telephone receivers will not work with al-ternati Stock Photo

RM2CRMN26–. Amateur radio : how and why of wireless with complete instructions on operation of receiving outfits . cturers,accordingly, make the cores permanent mag-nets by making them of steel, thus always ex-erting a pull on the metal diaphragm, but notenough to pull it to the magnets. (SeeFig. 6.) When the feeble radio current arrives atthe telephone all the energy is used in mag-nifying the attraction that the magnet exertson the diaphragm. This diaphragm is an ex-ceedingly sensitive piece of the phonemechanism. It takes very little energy tomove it. Telephone receivers will not work with al-ternati

RF2KG2GKW–Rotor for electric generator 3D illustration isolated on white background

Send torCirculars FOR EVERYPOSS1B DUTY Ladies at Home MAGNETS—Permanent Steel Magnets TM: Union Iron Mills Pitt.burgh Pa. IRON & WOOD WORKING MACHINERY OF EVERY DESCRIPTION. Cold Rolled Shafting. GEORGE PLACE & CO. Planing &. Matching SHINGLES HEADING AND STAVES NEWSPAPER FILE. °Tiff TY HOISTING OTIs BROS. & C STAIR-BUILDER. I paid. MONCKTON'S NATIONAL iSix dollars post BOULT'S PATENT P. BLAISDELL &. C e Worcester Mass. BLAKE'S PATENT New Haven Conn. $5$2 We send valuable package ot SHINGLE & BARREL MACHINERY. EAGLE FOOT LATHES for all CHINE RY., scientific american, 1875-01-16 Stock Photo

RM2ABWCRT–Send torCirculars FOR EVERYPOSS1B DUTY Ladies at Home MAGNETS—Permanent Steel Magnets TM: Union Iron Mills Pitt.burgh Pa. IRON & WOOD WORKING MACHINERY OF EVERY DESCRIPTION. Cold Rolled Shafting. GEORGE PLACE & CO. Planing &. Matching SHINGLES HEADING AND STAVES NEWSPAPER FILE. °Tiff TY HOISTING OTIs BROS. & C STAIR-BUILDER. I paid. MONCKTON'S NATIONAL iSix dollars post BOULT'S PATENT P. BLAISDELL &. C e Worcester Mass. BLAKE'S PATENT New Haven Conn. $5$2 We send valuable package ot SHINGLE & BARREL MACHINERY. EAGLE FOOT LATHES for all CHINE RY., scientific american, 1875-01-16

. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ntimately connected with its regu-lating properties. Magnetism may be excited in the field-magnets in various ways. 1. Magneto-Dynamo.—This type, shown in Fig. 17, is theoldest employed, and has permanent steel magnets. This formFig. 16.—Brushes ^^ ^^^ ^^*^ small machines for special i)ur[)oses, as in magneto-calls, telephones, etc.. and for experimental work,but has long been discarded in large machines on account Stock Photo

RM2CDXXJF–. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ntimately connected with its regu-lating properties. Magnetism may be excited in the field-magnets in various ways. 1. Magneto-Dynamo.—This type, shown in Fig. 17, is theoldest employed, and has permanent steel magnets. This formFig. 16.—Brushes ^^ ^^^ ^^*^ small machines for special i)ur[)oses, as in magneto-calls, telephones, etc.. and for experimental work,but has long been discarded in large machines on account

RF2KG2GR1–Rotor for electric generator 3D illustration isolated on white background

The LARGEST STOCK! The GREATEST VARIETY! The Lowest Prices ! AMERICAN EDUCATIONAL CYCLOEDIA STEEL STAMPS. Barnes' Foot-power Scroll Saws and Lathe. Box 2044. The Toll-Gat MAGNETS-Permanent Steel Magnets EVERY MAN HIS OWN GLAZIER. COLD ROLLED SHAFTTNG. Cold Rolled Shafting. Hubbard & Allen PATENT Planing ik Mate LUDLOW VALVES THE JOHN HARD ICK LE COUNT'S PATENT MACHINIST'S TOOLS Reduced Prices. Dollars. it ca 0 rtin E. M. MAYO'S PATENT BOLT CUTTER. CAUSEWAY& FRIEND STS. 80STO N. SO CANAL ST. CHICAGO. SHINGLE & BARREL MACHINERY AGENTS WANTED. RAUV UV the beat Paaelly Dipm la America wilt 13 3 BY Stock Photo

RM2ABWD45–The LARGEST STOCK! The GREATEST VARIETY! The Lowest Prices ! AMERICAN EDUCATIONAL CYCLOEDIA STEEL STAMPS. Barnes' Foot-power Scroll Saws and Lathe. Box 2044. The Toll-Gat MAGNETS-Permanent Steel Magnets EVERY MAN HIS OWN GLAZIER. COLD ROLLED SHAFTTNG. Cold Rolled Shafting. Hubbard & Allen PATENT Planing ik Mate LUDLOW VALVES THE JOHN HARD ICK LE COUNT'S PATENT MACHINIST'S TOOLS Reduced Prices. Dollars. it ca 0 rtin E. M. MAYO'S PATENT BOLT CUTTER. CAUSEWAY& FRIEND STS. 80STO N. SO CANAL ST. CHICAGO. SHINGLE & BARREL MACHINERY AGENTS WANTED. RAUV UV the beat Paaelly Dipm la America wilt 13 3 BY

RF2KG2GR3–Stator and rotor for electric generator 3D rendering isolated on white background

NJ' A FORTUNE MADE Machinists' Tools„ AGENTS WANTED. SCIOPTICONA&LATEsrINIPROVED Cope & Maxwell M'f'g Co. YALE IRON WORKS New Haven Conn. Barnes' Foot-power Scroll Saws and Lathe. Box 2044. IMPROVED MACHINERY for STAVE MAGNETS-Permanent Steel Magnets J. E. BUERK. P. 0. Box 979 Bostom Mass Todd & Rafferty Machine Co. PERFECT N EWS PA P ER FILE. -.0: SHORT HAND PLANING AND MATCHING LNG BENTEL MARCEDANT & CO. EAGLE FOOT LATHES NOTICE FOR BRIDGE CONTRACTORS Newhedford FIRE PROOF SHUTTERS. THE SIXTH Cincinnati Industrial Exposition Machinery Tested and Fully Reported upon. FRANK MILLWARD 1845. The Stock Photo

RM2ABWDBK–NJ' A FORTUNE MADE Machinists' Tools„ AGENTS WANTED. SCIOPTICONA&LATEsrINIPROVED Cope & Maxwell M'f'g Co. YALE IRON WORKS New Haven Conn. Barnes' Foot-power Scroll Saws and Lathe. Box 2044. IMPROVED MACHINERY for STAVE MAGNETS-Permanent Steel Magnets J. E. BUERK. P. 0. Box 979 Bostom Mass Todd & Rafferty Machine Co. PERFECT N EWS PA P ER FILE. -.0: SHORT HAND PLANING AND MATCHING LNG BENTEL MARCEDANT & CO. EAGLE FOOT LATHES NOTICE FOR BRIDGE CONTRACTORS Newhedford FIRE PROOF SHUTTERS. THE SIXTH Cincinnati Industrial Exposition Machinery Tested and Fully Reported upon. FRANK MILLWARD 1845. The

STEADY EMPLOYMENT BESSEMER Steel Wire Ropes MANUFACTURERS ATTENTION 9 The Science of 1875.-Pestenid -$1.60. THE NURSERY. Ladies at Home H. WESLEY PERKINS 'SCIENTIFIC' ENGRAVER MAGNETS-Permanent Steel Magnets ments. SHINGLE & BARREL MACHINERY M Sturtevant Blowers; and Differential pulley-Blocks. WeiSKS PATR5ON. NEW JERSEY. CA [OFFICIAL:I Index of Inventions Letters Patent of the United States, scientific american, 1874-11-28 Stock Photo

RM2ABWCKC–STEADY EMPLOYMENT BESSEMER Steel Wire Ropes MANUFACTURERS ATTENTION 9 The Science of 1875.-Pestenid -$1.60. THE NURSERY. Ladies at Home H. WESLEY PERKINS 'SCIENTIFIC' ENGRAVER MAGNETS-Permanent Steel Magnets ments. SHINGLE & BARREL MACHINERY M Sturtevant Blowers; and Differential pulley-Blocks. WeiSKS PATR5ON. NEW JERSEY. CA [OFFICIAL:I Index of Inventions Letters Patent of the United States, scientific american, 1874-11-28

100000 19000 Cash Gifts 50 each. .950.000 GrandTotal20000 Gifts all cash PRICE OF TICKETS. Tenths or each Coupon THO. E. [MARLETTE Established 1846. The Oldest Agency for Soliciting Patents i n the United States. 37 Park Row N. Y. Machinery. EAGLE FOOT LATHES Ladies at Home 'SCIENTIFIC' ENGRAVER MAGNETS—Permanent Steel Magnets SHINGLE & BARREL MACHINERY Work for all PLU MASS. Co. SIT gritittifiZ NOVEMBER 21 18741 To Advertisers. ENGRAVINGS. MUNN & CO. Publishers 37 PARK ROW NEW YORK, scientific american, 1874-11-21 Stock Photo

RM2ABWCJR–100000 19000 Cash Gifts 50 each. .950.000 GrandTotal20000 Gifts all cash PRICE OF TICKETS. Tenths or each Coupon THO. E. [MARLETTE Established 1846. The Oldest Agency for Soliciting Patents i n the United States. 37 Park Row N. Y. Machinery. EAGLE FOOT LATHES Ladies at Home 'SCIENTIFIC' ENGRAVER MAGNETS—Permanent Steel Magnets SHINGLE & BARREL MACHINERY Work for all PLU MASS. Co. SIT gritittifiZ NOVEMBER 21 18741 To Advertisers. ENGRAVINGS. MUNN & CO. Publishers 37 PARK ROW NEW YORK, scientific american, 1874-11-21

APPLICATIONS FOR EXTENSIONS. EXTENSIONS GRANTED. DISCLAIMER. DESIGNS PATENTED. TRADE MARKS REGISTERED. SCHEDULE OF PATENT FEES. HOW TO OBTAIN Patents ad Caveats IN CANADA. MUNN & CO. 37 Park Row New York. VALUE OF PATENTS And How to Obtain Them. To Make an Application for a Patent. How Can I Best Secure My Invention' Preliminary Examination. Foreign Patents. Trademarks. Value of Extended Patents. Caveats Design Patents. Copies of Patents. MUNN & CO. 37 Park Row New York. Aduertisentento. Back Page 81.00 a line. MAGNETS-Permanent Steel Magnets 500 RELIABLE THOROUGHLY RENOVATED thoritv from me Stock Photo

RM2ABWBHF–APPLICATIONS FOR EXTENSIONS. EXTENSIONS GRANTED. DISCLAIMER. DESIGNS PATENTED. TRADE MARKS REGISTERED. SCHEDULE OF PATENT FEES. HOW TO OBTAIN Patents ad Caveats IN CANADA. MUNN & CO. 37 Park Row New York. VALUE OF PATENTS And How to Obtain Them. To Make an Application for a Patent. How Can I Best Secure My Invention' Preliminary Examination. Foreign Patents. Trademarks. Value of Extended Patents. Caveats Design Patents. Copies of Patents. MUNN & CO. 37 Park Row New York. Aduertisentento. Back Page 81.00 a line. MAGNETS-Permanent Steel Magnets 500 RELIABLE THOROUGHLY RENOVATED thoritv from me

PORTABLE STEAM ENGINE. WITH V.0 THE J.C.HOADLEY CO. LAWRENCE MASS. UPRIGHT SHAPING MACHINE. EAGLE FOOT LATHES Barnes' Foot-power Scroll Saws and Lathe. W. F. & J. BARNES Box 2044. Improved FOOT LATHES. Foot Power Back-geared MAGNETS—Permanent Steel Magnets mated Tom Thump and Miniature Telegraph Instru ment. rum TRADE ENGINE. Patented March 3C I Address United States Piano Co. 810 Broadway'New York! SAFETY HOISTING OTIEP Machinery. 3tiode1 Engines. Castings Machinist% Tools. Catalogue for 1875 FOOT LATHES 815 and nwardsKeystone, scientific american, 1875-08-07 Stock Photo

RM2ABWDJM–PORTABLE STEAM ENGINE. WITH V.0 THE J.C.HOADLEY CO. LAWRENCE MASS. UPRIGHT SHAPING MACHINE. EAGLE FOOT LATHES Barnes' Foot-power Scroll Saws and Lathe. W. F. & J. BARNES Box 2044. Improved FOOT LATHES. Foot Power Back-geared MAGNETS—Permanent Steel Magnets mated Tom Thump and Miniature Telegraph Instru ment. rum TRADE ENGINE. Patented March 3C I Address United States Piano Co. 810 Broadway'New York! SAFETY HOISTING OTIEP Machinery. 3tiode1 Engines. Castings Machinist% Tools. Catalogue for 1875 FOOT LATHES 815 and nwardsKeystone, scientific american, 1875-08-07

NEW PLAYS JUST PUBLISHED. SHINGLES HEADING AND STAVES THE ROCKY MOUNTAIN HERALD P. DEL VA LLE HALSEY PATENT Planing &. Matching LUDLOW VALVES. AGENTS WANTED. BLAKE'S PATENT GEO. W. READ & CO. STEAM BAND SAW Hard-Wood Lumber AND CHOICE FIGURED VENEERS. The LARGEST STOCK I The GREATEST Machinery. OTIS BROS. & C Ladies at Home MAGNETS—Permanent Steel Magnets MACHINERY. Cold Rolled Shafting. BEAUTIFUL DECALCOMANIA EAGLE FOOT LATHES THE TWO MILLION POSITIVELY LAST CHANCE. POSITIVELY LAST CONCERT. Death of Gov. BramletteAction of the Trustees—A Successor Appointed—N More Postponements—Drawing Cer Stock Photo

RM2ABWD02–NEW PLAYS JUST PUBLISHED. SHINGLES HEADING AND STAVES THE ROCKY MOUNTAIN HERALD P. DEL VA LLE HALSEY PATENT Planing &. Matching LUDLOW VALVES. AGENTS WANTED. BLAKE'S PATENT GEO. W. READ & CO. STEAM BAND SAW Hard-Wood Lumber AND CHOICE FIGURED VENEERS. The LARGEST STOCK I The GREATEST Machinery. OTIS BROS. & C Ladies at Home MAGNETS—Permanent Steel Magnets MACHINERY. Cold Rolled Shafting. BEAUTIFUL DECALCOMANIA EAGLE FOOT LATHES THE TWO MILLION POSITIVELY LAST CHANCE. POSITIVELY LAST CONCERT. Death of Gov. BramletteAction of the Trustees—A Successor Appointed—N More Postponements—Drawing Cer

253 O.S HAS NO EQUAL FOR VARIETY QUALITY AND ECONOMY OF ITS WORK. HORIZONTAL AND UPRIGHT BORING MACHINES SUPERIOR TO ANY IN USE. Go. Machinery Sturtevant Blowers. Cold Rolled Shafting. Niagara Steam Pump. MIAS. B. HARDICK Niagara Steam Pump. PATENT Planing anti Matching Saw Arbors and other wood working machinery. FORSTEEP Room MAGNETS-Permanent Steel Magnets BLAKE'S PATENT Stone and Ore Breaker SHINGLE & BARREL MACHINERY LAMB'S KNITTING OVER 7000 IN USE LOLD ROLLED SHAFTING. AGENTS WANTED. HOLMES' Choice Books Various Arts and Trades. Ladies at Home E. M. KAYO'S PAT. BOLT CUTTER. Andrew's Stock Photo

RM2ABWCDW–253 O.S HAS NO EQUAL FOR VARIETY QUALITY AND ECONOMY OF ITS WORK. HORIZONTAL AND UPRIGHT BORING MACHINES SUPERIOR TO ANY IN USE. Go. Machinery Sturtevant Blowers. Cold Rolled Shafting. Niagara Steam Pump. MIAS. B. HARDICK Niagara Steam Pump. PATENT Planing anti Matching Saw Arbors and other wood working machinery. FORSTEEP Room MAGNETS-Permanent Steel Magnets BLAKE'S PATENT Stone and Ore Breaker SHINGLE & BARREL MACHINERY LAMB'S KNITTING OVER 7000 IN USE LOLD ROLLED SHAFTING. AGENTS WANTED. HOLMES' Choice Books Various Arts and Trades. Ladies at Home E. M. KAYO'S PAT. BOLT CUTTER. Andrew's

Saws and Lathe. Box 2044. PATENT Planing & Matching Cold Rolled Shafting. TRADE ENGINE. AA Model Engines. Ladies at Home Iron and Wood Work $77 Dollars. MACHINERY. LUDLOW VALVES. THE IMPROVED NIAGARA STEAM PUMP Hubbard & Aller. ENGINES AND BOILERS SAIKER'S MAGNETS—Permanent Steel Magnets 'REESE'S ADJUSTABLE STENCIL LETTERS BY MAIL. & CO. 189 & 191 Water St. N.Ir Machinist's Tools. E MAYO'S PATENT BOLT CUTTER %IV the bud Family Paper tu Azasates with HEATER & FILTER PREVENTS SCALE SAVES FUEL TO AN Economical Use of Steam. STILWELL & BIERCE M'F'G CO. THE ECLIPSE WATER WHEEL M'F'G CO. BLAKE'S Stock Photo

RM2ABWD61–Saws and Lathe. Box 2044. PATENT Planing & Matching Cold Rolled Shafting. TRADE ENGINE. AA Model Engines. Ladies at Home Iron and Wood Work $77 Dollars. MACHINERY. LUDLOW VALVES. THE IMPROVED NIAGARA STEAM PUMP Hubbard & Aller. ENGINES AND BOILERS SAIKER'S MAGNETS—Permanent Steel Magnets 'REESE'S ADJUSTABLE STENCIL LETTERS BY MAIL. & CO. 189 & 191 Water St. N.Ir Machinist's Tools. E MAYO'S PATENT BOLT CUTTER %IV the bud Family Paper tu Azasates with HEATER & FILTER PREVENTS SCALE SAVES FUEL TO AN Economical Use of Steam. STILWELL & BIERCE M'F'G CO. THE ECLIPSE WATER WHEEL M'F'G CO. BLAKE'S

1845. The Harrison Portable Mill Machinery. 1875 FAST GRINDING. SMALL POWER. rusi Catalogue 1875 THE II. B. BIGELOW & CO. New Haven Conn. Machinist's Tools. BOLT CUTTERS. Wood & Light Machine Co. Worcester Mass. Als Shafting Pulleys &c. TO ELECTRO-PLATERS. WHIPPLE'S SHINGLES HEADING AND STAVES Boult's Patent Paneling. Variety Moulding and Dovetailing Maclaine B. C. MACHINERY CO. Battle Creek Mich Barnes' Foot-power Scroll Saws and Lathe. Box 2044. 00 w PATENT Planing tik Matching IMPROVED MACHINERY for STAVE MAGNETS—Permanent Steel Magnets liewBedtbra YALE IRON WORKS New Haven Conn. MACHINERY Stock Photo

RM2ABWDHA–1845. The Harrison Portable Mill Machinery. 1875 FAST GRINDING. SMALL POWER. rusi Catalogue 1875 THE II. B. BIGELOW & CO. New Haven Conn. Machinist's Tools. BOLT CUTTERS. Wood & Light Machine Co. Worcester Mass. Als Shafting Pulleys &c. TO ELECTRO-PLATERS. WHIPPLE'S SHINGLES HEADING AND STAVES Boult's Patent Paneling. Variety Moulding and Dovetailing Maclaine B. C. MACHINERY CO. Battle Creek Mich Barnes' Foot-power Scroll Saws and Lathe. Box 2044. 00 w PATENT Planing tik Matching IMPROVED MACHINERY for STAVE MAGNETS—Permanent Steel Magnets liewBedtbra YALE IRON WORKS New Haven Conn. MACHINERY

OF EVERY DESCRIPTION. Cold Rolled Shafting. GEORGE PLACE Planing & Matching AGENTS WANTED. IMPROVED MACHINERY for STAVE Machinists' Tools PATENT Planing el. Matching BRADLEY Manufacturing Company OTIS BROS. & C PORTABLE STEAM ENGINE. Z.73 THE BESTe MOST ECONOMICAL ENGINE o'; 5` SEND FOR CIRCULAR. T H E J.C.HOADLEY C O. LAWRENCE MASS. MAGNETS-Permanent Steel Magnets EAGLE FOOT LATHES BOLT CUTTERS. Wood & Light Machine Co. Worcester Mass. OR STEAM STONE CUTTER CO. RUTLAND VT. INDIA RUBBER Advationnento. Inside Page 75 cents a line. BAIRD'S CLARK & COMPANY'S, scientific american, 75-09-11 Stock Photo

RM2ABWDNT–OF EVERY DESCRIPTION. Cold Rolled Shafting. GEORGE PLACE Planing & Matching AGENTS WANTED. IMPROVED MACHINERY for STAVE Machinists' Tools PATENT Planing el. Matching BRADLEY Manufacturing Company OTIS BROS. & C PORTABLE STEAM ENGINE. Z.73 THE BESTe MOST ECONOMICAL ENGINE o'; 5` SEND FOR CIRCULAR. T H E J.C.HOADLEY C O. LAWRENCE MASS. MAGNETS-Permanent Steel Magnets EAGLE FOOT LATHES BOLT CUTTERS. Wood & Light Machine Co. Worcester Mass. OR STEAM STONE CUTTER CO. RUTLAND VT. INDIA RUBBER Advationnento. Inside Page 75 cents a line. BAIRD'S CLARK & COMPANY'S, scientific american, 75-09-11

Shaping Machias:t 'BUSINESS on the PACIFIC COAST.' MACHINIST'S TOOLS. Reduced Prices. N. F. BURNHAM'S P. BLAISDELL & CO. Manufacturing Company ;Hi:BLAKE M{GC0.98(8.3ERPISTIII SEWS) Vi8V. NA.A M ST VKTV C) CAT Mechanics' Institute of San Francisco. SHINGLES HEADING AND STAVES MAGNETS—Permanent Steel Magnets IMPROVED MACHINERY for STAVE DIAC RINE RY. Cold Rolled Shafting. THE IMPROVED NIAGARA STE AM PUMP PIERCE WELL AUGER The Oldest Agency for Soliciting Patents in the United States. MUNN & CO. BLAKE'S PATENT DROP PRESSES. 1. BEAMS &GIRDERS OTIS' Machinery. OTIS BROS. & C Planing & Matching Stock Photo

RM2ABWDDG–Shaping Machias:t 'BUSINESS on the PACIFIC COAST.' MACHINIST'S TOOLS. Reduced Prices. N. F. BURNHAM'S P. BLAISDELL & CO. Manufacturing Company ;Hi:BLAKE M{GC0.98(8.3ERPISTIII SEWS) Vi8V. NA.A M ST VKTV C) CAT Mechanics' Institute of San Francisco. SHINGLES HEADING AND STAVES MAGNETS—Permanent Steel Magnets IMPROVED MACHINERY for STAVE DIAC RINE RY. Cold Rolled Shafting. THE IMPROVED NIAGARA STE AM PUMP PIERCE WELL AUGER The Oldest Agency for Soliciting Patents in the United States. MUNN & CO. BLAKE'S PATENT DROP PRESSES. 1. BEAMS &GIRDERS OTIS' Machinery. OTIS BROS. & C Planing & Matching

SCHEDULE OF PATENT FEES. 850 850 810 810 815 830 CANADIAN PATENTS. LIST OF PATENTS GRANTED IN CANADA. Aduerttoemento. Back Page 81.00 a line. Inside Page 75 cents a line. 34 Park Row. New York. OVER 7000 IN USE BLAKE'S STEAM PUMP L. & j. W. FEITCHTWANGEB 180 FULTON ST. NEW YORK. MAGNETS-Permanent Steel Magnets E. M. MAYO'S PAT. BOLT CUTTER. SHINGLE & B A.RREL MACHINERY. HYDRAULIC JACK. SIONCKTON'S NATIONAL Six Dollars post STA IR-BUILDER. S paid. SIONCKTON'S NATIONAL?. Six Dollars. post CARPENTER dk JOINER. S paid. ORANGE JUDD CO 145 Broadway N.Y RISDON'S IMPROVED TURBINE. A Set of 12 Steel Stock Photo

RM2ABWC0R–SCHEDULE OF PATENT FEES. 850 850 810 810 815 830 CANADIAN PATENTS. LIST OF PATENTS GRANTED IN CANADA. Aduerttoemento. Back Page 81.00 a line. Inside Page 75 cents a line. 34 Park Row. New York. OVER 7000 IN USE BLAKE'S STEAM PUMP L. & j. W. FEITCHTWANGEB 180 FULTON ST. NEW YORK. MAGNETS-Permanent Steel Magnets E. M. MAYO'S PAT. BOLT CUTTER. SHINGLE & B A.RREL MACHINERY. HYDRAULIC JACK. SIONCKTON'S NATIONAL Six Dollars post STA IR-BUILDER. S paid. SIONCKTON'S NATIONAL?. Six Dollars. post CARPENTER dk JOINER. S paid. ORANGE JUDD CO 145 Broadway N.Y RISDON'S IMPROVED TURBINE. A Set of 12 Steel

BAIRD'S Cooper's Engine & Mill Works A Set of 12 Steel Lathe Don HUSSEY'S NATIONAL The American Turbine Water Wheel WOODWORTH PLANERS PATENTS MAGNETS—Permanent Steel Magnets E. M. MAYO'S PAT. BOLT CUTTER. RISDON'S IMPROVED TURBINE. OVER 7000 IN USE BLAKE'S STEAM PUMP Machinery. BLAKE'S PATENT Stone and Ore Breaker Machinery Sturtevant Blowers. Cold Rolled Shafting. Niagara Steam Pump. THE JOHN HARDICK Niagara Steam Pump. EI Milling Machines. MACHINERY. SHINGLE & B &EARL MACHINERY. Haerk's Watchman's Time Detector capaole of R. BALL (lc CO. WOOD WORKING MACHINERY. THE BEST MECHANICAL PAPER IN Stock Photo

RM2ABWC26–BAIRD'S Cooper's Engine & Mill Works A Set of 12 Steel Lathe Don HUSSEY'S NATIONAL The American Turbine Water Wheel WOODWORTH PLANERS PATENTS MAGNETS—Permanent Steel Magnets E. M. MAYO'S PAT. BOLT CUTTER. RISDON'S IMPROVED TURBINE. OVER 7000 IN USE BLAKE'S STEAM PUMP Machinery. BLAKE'S PATENT Stone and Ore Breaker Machinery Sturtevant Blowers. Cold Rolled Shafting. Niagara Steam Pump. THE JOHN HARDICK Niagara Steam Pump. EI Milling Machines. MACHINERY. SHINGLE & B &EARL MACHINERY. Haerk's Watchman's Time Detector capaole of R. BALL (lc CO. WOOD WORKING MACHINERY. THE BEST MECHANICAL PAPER IN

Baltimore Md. SHINGLES HEADING AND STAVES PILES SAFETY HOISTING OTIS BROS. & C tdAGNETS—Permanent Steel Magnets MOUNT VERNON OHI Machinists' Tools Worcester Mass. INDIA RUBBER PATENT Planing ct Matching THE IMPROVED itiubbara & Aller. ENGINES AND Bonalui CIIINERY. IRON & WOOD WORKING MACHINERY OF EVERY DESCRIPTION. Cold Rolled Shafting. GEORGE PLACE Machinist's Tools. BOOKWALTER ENGINE JAS. LEFFEL & CO. OR WARDWELL PATENT PORTABLE and STATIONARY MILL GEARING MADE Without Patter ns. SHAFTING.PULLEYS AND HANGERS A Specialty. BRADLEY STEEL CASTINGS. BOLT CUTTERS. IMPROVED MACHINERY for STAVE Stock Photo

RM2ABWDR5–Baltimore Md. SHINGLES HEADING AND STAVES PILES SAFETY HOISTING OTIS BROS. & C tdAGNETS—Permanent Steel Magnets MOUNT VERNON OHI Machinists' Tools Worcester Mass. INDIA RUBBER PATENT Planing ct Matching THE IMPROVED itiubbara & Aller. ENGINES AND Bonalui CIIINERY. IRON & WOOD WORKING MACHINERY OF EVERY DESCRIPTION. Cold Rolled Shafting. GEORGE PLACE Machinist's Tools. BOOKWALTER ENGINE JAS. LEFFEL & CO. OR WARDWELL PATENT PORTABLE and STATIONARY MILL GEARING MADE Without Patter ns. SHAFTING.PULLEYS AND HANGERS A Specialty. BRADLEY STEEL CASTINGS. BOLT CUTTERS. IMPROVED MACHINERY for STAVE

More Postponements-Drawing Cer tain February 27th. Ladies at Home MAGNETS-Permanent Steel Magnet E. M. MAYO'S PATENT BOLT CUTTER. PORTA.BLE ENGINES FOOS & JAYNE EAGLE FOOT LATHES Planing & Matching STEEL CASTINGS. THE FRANZ & POPE Asbestos Felting Co. Automatic Family Knitting Machines. GOLDEN HARVEST FOR A GENTS Choice Books FIRST & PRYIBIL 40th St. New York City. 461 to 467 W. PATENT LUDLOW VALVES. L. FEUCHTWANGER CO. THE JOHN HARDICK 1 Universal Band Planing Marline. P. BLAISDELL & CO. Worcester Mass. CHAS B HARDICR Cold Rolled Shafting. MACHINERY New Variety Moulding Machine Model Engines Stock Photo

RM2ABWD21–More Postponements-Drawing Cer tain February 27th. Ladies at Home MAGNETS-Permanent Steel Magnet E. M. MAYO'S PATENT BOLT CUTTER. PORTA.BLE ENGINES FOOS & JAYNE EAGLE FOOT LATHES Planing & Matching STEEL CASTINGS. THE FRANZ & POPE Asbestos Felting Co. Automatic Family Knitting Machines. GOLDEN HARVEST FOR A GENTS Choice Books FIRST & PRYIBIL 40th St. New York City. 461 to 467 W. PATENT LUDLOW VALVES. L. FEUCHTWANGER CO. THE JOHN HARDICK 1 Universal Band Planing Marline. P. BLAISDELL & CO. Worcester Mass. CHAS B HARDICR Cold Rolled Shafting. MACHINERY New Variety Moulding Machine Model Engines

New Haven Conn Planing & Match DROP PRESSES. CHAS. B. HARDICK STEEL STAMPS. SHINGLE & BARREL MACHIMRY MACHINERY NEW & SECOND-HAND. 26 PEMBERTON SQ. BostonMass. Moulding Machine SAFETY HOISTING OTIS' Machinery. OTIS BROS. & C Iron and Wood Work TULLY & WILDE PATENT Planing & Matching LUDLOW VALVES THE JOHN HARDICK CHINERY. Cold Rolled Shafting. LOCOMOTIVE BY H. N. FORNEY Mechanical Engineer Price 62.50 postage paid. TIIE RAILROAD GAZETTE 73 Broadway New York. Universal Hand Planing DIsteldne. THE ECLIPSE M'F'G CO. HEATER &FILTER PREVENTS SCALE SAVES FUEL STIL WELL & BIERCE M'F'G GEO. W. READ Stock Photo

RM2ABWD2N–New Haven Conn Planing & Match DROP PRESSES. CHAS. B. HARDICK STEEL STAMPS. SHINGLE & BARREL MACHIMRY MACHINERY NEW & SECOND-HAND. 26 PEMBERTON SQ. BostonMass. Moulding Machine SAFETY HOISTING OTIS' Machinery. OTIS BROS. & C Iron and Wood Work TULLY & WILDE PATENT Planing & Matching LUDLOW VALVES THE JOHN HARDICK CHINERY. Cold Rolled Shafting. LOCOMOTIVE BY H. N. FORNEY Mechanical Engineer Price 62.50 postage paid. TIIE RAILROAD GAZETTE 73 Broadway New York. Universal Hand Planing DIsteldne. THE ECLIPSE M'F'G CO. HEATER &FILTER PREVENTS SCALE SAVES FUEL STIL WELL & BIERCE M'F'G GEO. W. READ

electro-magnet for whatever purpose used. matter may be obtained by addressing the inventor wish to preserve files of valuable papers and to have them always ready for reference. the middle at their ends. On the inside of the opposite HOLCOMB'S IMPROVEMENTS IN ELECTRO-MAGNETS. A permanent steel magnet. C. has connected with in telegraphing the spring is so strained that it will just balance the power induced in the cores by the per twice as powerful as if no permanent magnet were used or it enables a spring of given power to operate with a of May 1860 and further information in relation to the Stock Photo

RM2ABTD88–electro-magnet for whatever purpose used. matter may be obtained by addressing the inventor wish to preserve files of valuable papers and to have them always ready for reference. the middle at their ends. On the inside of the opposite HOLCOMB'S IMPROVEMENTS IN ELECTRO-MAGNETS. A permanent steel magnet. C. has connected with in telegraphing the spring is so strained that it will just balance the power induced in the cores by the per twice as powerful as if no permanent magnet were used or it enables a spring of given power to operate with a of May 1860 and further information in relation to the

Wood Working Machinery. Catalogue for 1875 FREE' FOOT LATHES $15 and upwards.-Keystone STEVENS' MITRE BOX. C OLD ROLLED SHAFTING. BRADLEY Manufacturing Company FIRE PROOF SHUTTERS. CLARK & CO'S SELF-COILING ROLLING STEEL SHUTTERS (Burglar Proof) For Store STEAM PUMPS. BLAKE'S PATENT The HOAD L EY PORTABLE STEAM ENGINE. Machinery. OTIS BROS. & C Planing ett Match Machinists' Tools. THE BE STe MOST ECONOMICAL ENGINE?' THE J.C.HORDLEY CO. LAWRENCE MASS. EAGLE FOOT LATHES PATENT YALE Reverse Motion Panelin a. Variety Moulding and Dovetailing Machine Battle Creek Mich Valuable Books Heat Steam and Stock Photo

RM2ABWDFE–Wood Working Machinery. Catalogue for 1875 FREE' FOOT LATHES $15 and upwards.-Keystone STEVENS' MITRE BOX. C OLD ROLLED SHAFTING. BRADLEY Manufacturing Company FIRE PROOF SHUTTERS. CLARK & CO'S SELF-COILING ROLLING STEEL SHUTTERS (Burglar Proof) For Store STEAM PUMPS. BLAKE'S PATENT The HOAD L EY PORTABLE STEAM ENGINE. Machinery. OTIS BROS. & C Planing ett Match Machinists' Tools. THE BE STe MOST ECONOMICAL ENGINE?' THE J.C.HORDLEY CO. LAWRENCE MASS. EAGLE FOOT LATHES PATENT YALE Reverse Motion Panelin a. Variety Moulding and Dovetailing Machine Battle Creek Mich Valuable Books Heat Steam and

FIRE PROOF SHUTTERS. BOOR.WALTER ENGINE. JAS. LEFFEL & C - UPRIGHT SHAPING MACHINE. TTIIIIII T „ pAlr-EN-ir LOLD ROLLED SHAFTING. BLAKE'S PATENT Stone and Ore Breaker AND KNITTING MACHINES. SAFETY HOISTING OTIS' Machinery. Planing dc Mate Machinists' Tools. EAGLE FOOT LATHES STILWELL'S Patent Lime Extracting HEATER FILTER Is Indispensable to an Eco nomical Use of Steam. TO ELECTRO-PLATERS. WHIPPLE'S Machinery et Improved Styles for magma SHINGLES HEADING AND STAVES STEEL CASTINGS. MAcKINERy PLANING &MATCHING MOULDING MORTISING J TAMP! CO. Bradley's Cushioned Hammer BRADLEY Manufacturing Compan Stock Photo

RM2ABWDJ0–FIRE PROOF SHUTTERS. BOOR.WALTER ENGINE. JAS. LEFFEL & C - UPRIGHT SHAPING MACHINE. TTIIIIII T „ pAlr-EN-ir LOLD ROLLED SHAFTING. BLAKE'S PATENT Stone and Ore Breaker AND KNITTING MACHINES. SAFETY HOISTING OTIS' Machinery. Planing dc Mate Machinists' Tools. EAGLE FOOT LATHES STILWELL'S Patent Lime Extracting HEATER FILTER Is Indispensable to an Eco nomical Use of Steam. TO ELECTRO-PLATERS. WHIPPLE'S Machinery et Improved Styles for magma SHINGLES HEADING AND STAVES STEEL CASTINGS. MAcKINERy PLANING &MATCHING MOULDING MORTISING J TAMP! CO. Bradley's Cushioned Hammer BRADLEY Manufacturing Compan

NTO FILES ARE USED ON HOE'S CHISEL THE EXCELSIOR DRY LEVEL NICKELP.LATING BATTERIES With Disston's Saws. LANGDON MITRE BOX CO. THE CHRISTIAN UNION. Sermons in Plymouth Church. NOYE'S Mill Furnishing Works Engineers Farmers Housekeepers and Workmen generally. —:o: Contents. DEPARTMENT OF MECHANICS. DEPARTMENT OF ENGINEERING. DEPARTMENT OF PRACTICAL TECHNOLOGY. DEPARTMENT OF THE FARM. Wrinkles and Recipes 84.20 Address H. N. MUNN 37 Park Row New York City. HARTFORD STEAM BOILER Inspection & Insaram COMPANY fB Plarien Sae. THE run NON-COMBUSTIBLE STEAM BOILER & PIPE OVERI WITH AIR SPACE Stock Photo

RM2ABWE0E–NTO FILES ARE USED ON HOE'S CHISEL THE EXCELSIOR DRY LEVEL NICKELP.LATING BATTERIES With Disston's Saws. LANGDON MITRE BOX CO. THE CHRISTIAN UNION. Sermons in Plymouth Church. NOYE'S Mill Furnishing Works Engineers Farmers Housekeepers and Workmen generally. —:o: Contents. DEPARTMENT OF MECHANICS. DEPARTMENT OF ENGINEERING. DEPARTMENT OF PRACTICAL TECHNOLOGY. DEPARTMENT OF THE FARM. Wrinkles and Recipes 84.20 Address H. N. MUNN 37 Park Row New York City. HARTFORD STEAM BOILER Inspection & Insaram COMPANY fB Plarien Sae. THE run NON-COMBUSTIBLE STEAM BOILER & PIPE OVERI WITH AIR SPACE

SCHEDULE OF PATENT FEES. CANADIAN PATENTS. Back Page 81.00 a line. TO ELECTRO-PLATERS JEWELERS AND WATCHMAKERS. DAVID'S PATENT E. M. MAYO'S PATENT BOLT CUTTER NEW DRAWING PRESS & OTHER TOOLS. VOLNEY W. MASON ds CO. THE BASTET PRICb. L. BASTET PATENT Planing tfc Matching 8000 in Use ! STEAM PUMPS NEW BOORS. 446 Broome Street New York. HAIR-FELT-HAIR-FELT MACHINERY. THE IMPROVED NIAGARA STEAM PUMP Hubbard & Aller 01KISG PLANING &MATCHING MOULDING MORTISING BAND & SCROLL SAWS &c. &c. SELLING RAPIDLY. Planing it Matching BOLT CUTTERS. WorcesterMass. Machinists' Tools Machinery. OTIS BROS. & Cold Stock Photo

RM2ABWDTR–SCHEDULE OF PATENT FEES. CANADIAN PATENTS. Back Page 81.00 a line. TO ELECTRO-PLATERS JEWELERS AND WATCHMAKERS. DAVID'S PATENT E. M. MAYO'S PATENT BOLT CUTTER NEW DRAWING PRESS & OTHER TOOLS. VOLNEY W. MASON ds CO. THE BASTET PRICb. L. BASTET PATENT Planing tfc Matching 8000 in Use ! STEAM PUMPS NEW BOORS. 446 Broome Street New York. HAIR-FELT-HAIR-FELT MACHINERY. THE IMPROVED NIAGARA STEAM PUMP Hubbard & Aller 01KISG PLANING &MATCHING MOULDING MORTISING BAND & SCROLL SAWS &c. &c. SELLING RAPIDLY. Planing it Matching BOLT CUTTERS. WorcesterMass. Machinists' Tools Machinery. OTIS BROS. & Cold

STEAM BAND SAW Hard-Wood Lumber AND CHOICE FIGURED VENEERS. The LARGEST STOCK ! The GREATEST THE AXERICAN EDUCATIONAL CYCLOPEDIA THE FRANZ & POPE Knitting Machine Co. E. M. MAYO'S PATENT BOLT CUTTER. Established 2846 The Oldest Agency for Soliciting Patents in the United States. the bast Family Paper in America. witi kw tittemart FessOgJetannii. Betrity. L $2400 Planing & Matching PATENT LUDLOW VALVES. THE JOHN HARD ICK Hubbard & Aller. CHINERY. Cold Rolled Shafting. T L L IT STRATED SPRING CATALOGUE P. BLAISDELL & CO. Worcester Mass. Steam Pum s STEEL CASTINGS. Universal Band Planing Machine Stock Photo

RM2ABWD3G–STEAM BAND SAW Hard-Wood Lumber AND CHOICE FIGURED VENEERS. The LARGEST STOCK ! The GREATEST THE AXERICAN EDUCATIONAL CYCLOPEDIA THE FRANZ & POPE Knitting Machine Co. E. M. MAYO'S PATENT BOLT CUTTER. Established 2846 The Oldest Agency for Soliciting Patents in the United States. the bast Family Paper in America. witi kw tittemart FessOgJetannii. Betrity. L $2400 Planing & Matching PATENT LUDLOW VALVES. THE JOHN HARD ICK Hubbard & Aller. CHINERY. Cold Rolled Shafting. T L L IT STRATED SPRING CATALOGUE P. BLAISDELL & CO. Worcester Mass. Steam Pum s STEEL CASTINGS. Universal Band Planing Machine

JONES & LAUGHLINS 190 . Canal it. Chicago. DANA& FITE. Boston Mess. PATENT Flawing and Matcling and Melding MschMeeGray & Wood's PlanenSelf.oiling CHRISTMAS BELLS FOR 1871 achinery. R Counsellorat Law 9 & Nunn at Room 26 New P. BLAISDELL & C Worcester Masa. Manufacturers of the Blaisdell Patent Upright Drills parcararG Set Address THE Exormwrowir. Corm. wprmousi twee a inowerson. TONE SAWING MACHINERY DERRICKS & TRAVELLERS THOMAS ROSS Rutland Vt. . New York. I Niagara Steam Pump. CHAS B HABDICH NONPAREIL MILLS. French Cone-Burr Mills. STEAM PUMP NATIONAL CARPENTER & JOINER. 5 paid. NewBurr Stock Photo

RM2ABWCM3–JONES & LAUGHLINS 190 . Canal it. Chicago. DANA& FITE. Boston Mess. PATENT Flawing and Matcling and Melding MschMeeGray & Wood's PlanenSelf.oiling CHRISTMAS BELLS FOR 1871 achinery. R Counsellorat Law 9 & Nunn at Room 26 New P. BLAISDELL & C Worcester Masa. Manufacturers of the Blaisdell Patent Upright Drills parcararG Set Address THE Exormwrowir. Corm. wprmousi twee a inowerson. TONE SAWING MACHINERY DERRICKS & TRAVELLERS THOMAS ROSS Rutland Vt. . New York. I Niagara Steam Pump. CHAS B HABDICH NONPAREIL MILLS. French Cone-Burr Mills. STEAM PUMP NATIONAL CARPENTER & JOINER. 5 paid. NewBurr

Back Page 61.00 a line. T JULY2S NON-COMBUSTIBLE STEAM BOILER & PIPE ''TERING WITH ' AIR SPACE' IMPROVEMENT. PORTLAND CEMENT IRON PLANERS. NEW HAVEN MANUFACTURING CO. New Haven. Conn THE SOUTHERN:STATES AGRICULTURAL AND INDUSTRIAL Will be Held on the Fair Grounds at Schlenker's Stationary AND HOWARD IRON WORKS BUFFAL N.Y. HARTFORD COMPANY. HARTFORD .CONN. MURRILL clz REIZER 44 Holliday St.Balt. Portland Cement. From the best London Manufacturers. For sale by THE BEST INJECTOR For Locomotive and Stationary Boilers. FRIEDMANN'S PATENT. Over 15000 Now in Use Here and in Europe. NOTE'S Mill Stock Photo

RM2ABWE2E–Back Page 61.00 a line. T JULY2S NON-COMBUSTIBLE STEAM BOILER & PIPE ''TERING WITH ' AIR SPACE' IMPROVEMENT. PORTLAND CEMENT IRON PLANERS. NEW HAVEN MANUFACTURING CO. New Haven. Conn THE SOUTHERN:STATES AGRICULTURAL AND INDUSTRIAL Will be Held on the Fair Grounds at Schlenker's Stationary AND HOWARD IRON WORKS BUFFAL N.Y. HARTFORD COMPANY. HARTFORD .CONN. MURRILL clz REIZER 44 Holliday St.Balt. Portland Cement. From the best London Manufacturers. For sale by THE BEST INJECTOR For Locomotive and Stationary Boilers. FRIEDMANN'S PATENT. Over 15000 Now in Use Here and in Europe. NOTE'S Mill

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