Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 719
Ingot Mould. the body, is concaved on its under surface and provided witha -| inch central aperture. The cover and the body are en-circled by sheet iron. It is not difficult to make a furnace which will comparefavorably with the original article. x\ny tin or sheet ironcan of the right size may be… … Crucible Tongs. bottle having a raised bottom serves as a pattern for the in-terior of the furnace. The upper portion of the raisedbottom is filled in with plaster of Paris or cement to give thecrucible support a level top. The material used in the for-mation of the furnace is clay of the quahty…
Physics · Lantern projection · Electric apparatus and appliances
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