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 ...

The fusion of metals and the mode of mixing them in the crucible ... for instance, copper or iron. In alloys oontaining tin, however, a laler of charcoal placed in the crucible is liable to ...