If desired, annotate the paper or acetate slide with the reactions described in the Explore the Chemistry section. Transfer tin solution to petri dish. Attach two wires to the paper clips using the ...

The best mode of mixing the component metals of t!,is alloy appear* to be tt meiteach separately, and then to add the tin to the copper at the lowest stiniiu; 'ettipeiature. To complete the ...

A machine of an improved character for cutting tin and sheet iron has been invented by Henry C. Hart, of New York City, who has taken measures to secure a patent. The apparatus, in its general ...