alloys, care must be taken to have the more infusible metals melted
first, and afterwards add the others.


151. BRITANNIA METAL

Take 4 parts of brass, and 4 parts of tin; when fused add 4 parts of
metallic bismuth, and 4 parts of metallic antimony. This composition
is added at discretion to metallic tin, according to the quality you
wish to make.


152. BLANCHED COPPER

Melt together 8 parts of copper and a half part of arsenic.


153. COMMON PEWTER

Melt together 4 parts of tin and 1 part of lead.


154. BEST PEWTER

Melt together 100 parts of tin and 17 of antimony.


155. A METAL THAT EXPANDS IN COOLING

Melt together 9 parts of lead, 2 of antimony and one of bismuth. This