Stone drill with point for drilling in natural stone and concrete photographed in the studio

RFID:2AK062X

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Contributor:

Helmut Feil / Alamy Stock Photo

Image ID:

2AK062X

File size:

120.7 MB (1.9 MB Compressed download)

Releases:

Model - no | Property - noDo I need a release?

Dimensions:

7952 x 5304 px | 67.3 x 44.9 cm | 26.5 x 17.7 inches | 300dpi

Date taken:

27 December 2019

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RM2AN1RYW–Researches into the early history of Mankind and the development of Civilization . ds, as pointed with a nail or a sail needle, got fromthe foreigners,^ but the specimen presented by him to theHunterian Museum at Glasgow has a stone point. The nativesuse it for drilling their fish-hooks made of shell; for which pur-pose, as for drilling holes in china, it is peculiarly adapted, thelightness and evenness of its pressure lessening the danger ofcracking these brittle materials. One would think that thisquahty would make the pump-drill particularly unsuitable forfire-making; but, nevertheless, by

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RM2AG6W20–. The Granite monthly : a magazine of literature, history and state progress. and point, he roughs off the surface, making due allowancefor the work required. If it is a bed ? 7 I . i- ?? ?: H • - |-1 ? :? i •-? ? i*| ? ? yi 1 ?• - i ? ?; ??:i:l^i 1 ,, j | ? , 1 4i QUARRYING AND STONE-CUTTING. he points it down level with his draftlines, and is not so particular as if itis for face work, and where there ismuch rough to take off, he plugs itoh where necessary, by drilling plugholes with a drill and using wedgesand half-rounds as used in quarrying.Where it is face work more care isnecessary : it

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RMRGXHF7–. Bulletin. Ethnology. FiG. 222. Weighted drills. complished the most. Describing his experiments in drilling cat- linite with bow and pump drills, Mr. McGuire states^ that in starting the hole the point of the drill, if of copper or stone, readily took hold of the stone, but that wood and bone did not do so unless supple- mented by sand. Trouble was caused by choking from the powdered stone and sand before the hole was very deep. By working with the stone under water the smaller particles floated otf, a condition which made it possible for the cutting to proceed to advantage. The jasper point

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Stone drill with point for drilling in natural stone and concrete photographed in the studio

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