Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 722
s are simply smallpieces of oak or steel, which are driven into the crack until an opei :ng sufficient for the introduc-tion of jimmies is effected. Drills are always of the finest tempered steel, and are often employedin connection with the blow-pipe, which is used to draw the temper and thus… … 692 SAND-BLAST. SAND-BLAST. A process by which common sand, powdered quartz, emery, or any sharp cuttingmaterial, is forced or blown upon the surface of any brittle substance, through which means the latteris cut, drilled, or engraved. It is the invention of Mr. B. F. Tilgliman of Philadelphia. A…
Mechanical engineering -- Dictionaries
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