This section is from the book "The English And American Mechanic", by B. Frank Van Cleve. Also available from Amazon: The English And American Mechanic.
Gold, 5 dwt.; copper, 5 dwt.
Gold, 10 dwt.; silver, l dwt.; copper, 4 dwt.
Gold, 5 dwt; silver, 21 {gr.
Gold, 3 dwt. 15 gr.; silver, 1 dwt. 9 gr.
Gold, 5 dwt.; steel filings, 5 dwt.
Gold, 18 dwt. 9gr.; silver, 21 gr.; copper, 18 gr. These all require to be submitted to the process of wet-coloring.
Copper, 16 parts; platina, 7 parts; zinc, 1 part; fused together.
 
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