Solvent For Gold

Mix equal quantities of nitric and muriatic acids.

Chinese White Copper

Copper, 40.4; nickel, 31.6; zinc, 25.4; iron, 2.6 parts.

Manheim Gold

Copper, 3; zinc, 1 part and a small quantity of tin.

Alloy Of The Standard Measures Used By The British Goverment

Copper 576; tin, 59; and brass, 48 parts.

Bath Metal

Brass, 32; and zinc, 9 parts.

Speculum Metal

Copper, 6; tin, 2; and arsenic, 1 part or, copper, 7; zinc, 3; and tin, 4 parts.

Blanched Copper

Copper, 3; and arsenic, 1/2 part.

Common Pewter

Tin, 4; Lead, 1 part.

Best Pewter

Tin, 100; antimony, 17 parts.

A Metal That Expands In Cooling

Lead, 9; antimony, 2; bismuth, 1 part. This metal is very use ful in filing small defects in iron castings, etc.

Queen's Metal

Tin, 9; antimony, 1; bismuth, 1; lead, 1 part.

Mock Piatinum

Brass, 8; zinc, 5 parts.

Mock Gold

Fuse together copper, 16; platinum, 7; zinc, 1 part. When steel is alloyed with 1-500 part of platinum, or with 1-500 part of silver, it is rendered much harder, more malleable, and better adapted for every kind of cutting instrument.

Note. - In making alloys, care must be taken to have the more infusible metals melted first, and afterwards add the other's.