Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 728
/,Vent Wire, c, Lifter and Stick. piercing the sandpattern by means MECHANICAL OPERATIONS. 705 common fire. Brass or bronze may be melted in a sandcrucible in a coal fire having a good draught. In small quan-tities it may be melted in the gas furnance described else-where in this chapter. A little… … Moulding Carbon Plates. apparatus, such as pulverizing mills, hydraulic presses, andretorts or ovens ; but the amateur, without a great deal oftrouble, and with very little expense, can make carbon platesand rods which will answer a good purpose. The mate-rials required are coke, wheat flour,…
Physics · Lantern projection · Electric apparatus and appliances
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