The Civil engineer and architect's journal, scientific and railway gazette . As thisis very accessible, it promises to become of great value, and there is no doubtthat similar stores of the phosphate may be be found iu other parts wherethe greeii sand formation is situated. REGISTER OP tSESKT PATENTS. EXPANSIVE ROTARY STEAM-ENGINE. Robert Wilson, M. A., of Greenock, for Improvtments in cer-tain kinds of rotary steam-engines^ part of which improvements oreapplicable to rotary engines worked by water or by the wind; also animprovement in safety-valves fur steam-boilers.—Granted January13; Enroll
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The Civil engineer and architect's journal, scientific and railway gazette . As thisis very accessible, it promises to become of great value, and there is no doubtthat similar stores of the phosphate may be be found iu other parts wherethe greeii sand formation is situated. REGISTER OP tSESKT PATENTS. EXPANSIVE ROTARY STEAM-ENGINE. Robert Wilson, M. A., of Greenock, for Improvtments in cer-tain kinds of rotary steam-engines^ part of which improvements oreapplicable to rotary engines worked by water or by the wind; also animprovement in safety-valves fur steam-boilers.—Granted January13; Enrolled July 13, 1848. The chief object of this invention is to introduce the princij)leof working steam e.xpansively into rotary engines. This is proposedto be effected by causing the steam which has first acted by impactin one direction against the vanes of a wlieel, to operate again byreaction in opposite directions in issuing out of the intervalsbetween the vanes. The figure re])resents a side elevation of anengine constructed according to this part of the invention, and. Laving one-half oftheeovei or side removed, in order to exhibitthe internal construction. The circular case is rendered steam-tight, and has an entrance-passage at I, for the steam. Tliere isalso an eduction-passage at K, through which tlie i~teiim in anexpanded state is allowed to pass away into tlie air, or else into acondenser; and although the induction-passage k appears verynear to the entrance-passage I, yet the steam does not pass directlyto K, but passes nearly all round within the case, in order to imjielthe vanes g g, by acting over and over again with more and moreexpansive action at several different places around, within thecircumference of the case, in succession, before the steam arrivesin a very expanded state at the eduction-passage K. In addition to the curved vanes g g, there are other curved vanes r r, fixedwithin chambers n »/, which the patentee calls reversing-chambers, and which with t