al form the “ cutter” resembles a heavy pick. Its length of with a little wet cotton. This operation is not attended with eraving is to provide a safeguard against the rising of im- stroke is386 inch. Hitherto it has been « defect in these ma- any danger to the proof, the collodion being stronger… … per ina dish with the following mixture, which should be chine in the workings by an india-rubber pipe, and the ma- closets, and to prevent the evaporation of liquids under certain | warm :— . circumstances. It is evidently excellently well adapted to chine may tiius be moved about from one part of…
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