Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 241
the cut-out portion removed, and screw or nail thethree firmly together. Scrap-zinc or old battery-zincs may bemelted over a Bunsen burner, or better, over a gas stove. Afterthe zinc is melted, it should not be left in the ladle very long, asit oxidizes rapidly. Take a piece of battery-wire, say… … does not touch the bottom of the mould, and so that it will becovered by the zinc. Pour in the melted zinc in a thin stream,being careful that no scum passes, until no more can be addedwithout overflowing. Leave it in the mould until nearly cold.Tip the mould upside down, give it a few raps on the…
Physics
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