1. English Standard

Copper, 7.50parts; sliver, 92.50 parts.

2. American Standard

Copper, 10 parts; silver, 90 parts.

French The Same

Gilding Metal for common jewelry is made by mixing 4 parts copper with one of calamine brass. Sometimes 1 lb. copper with 6 oz. of brass.

Jeweller's Gold Compositions, Common Gold

Silver, 1 part; Spanish copper, 16 parts; gold, 2 parts; mix.

Ring Gold

Spanish copper, (6 parts; silver, 8 parts; gold, 5 parts; mix. Man-HEIM gold - Copper, 3 parts; zinc, 1 part; melt, and stir well.

Mosaic Gold

Copper and zinc, equal parts; melt at the lowest temperature that will fuse the former, then mix by stirring, and add 5 percent. more zinc.

Parker's Mosaic Gold

Copper, 100 Parts; Zinc 54 Parts; Mix. For

Common Jewelry

Copper, 3 parts; 1 of old brass, and 4 oz. of tin to every pound of copper.

Factitious Gold

Copper. 16 parts; platinum, 7 parts; zinc, 1 part; fused together. This alloy resembles gold of 16 carats fine, or 2/3, and will resist the action of nitric acid, unless very concentrated and boiling.

Harmstadt's True Imitation of Gold is staled not only to resemble gold in color, but also in specific gravity and ductility. Platinum. 16 parts; copper, 7 parts; zinc, 1 part; put in a crucible, cover with charcoal powder, and melt into a mass.

Do. Of Silver

Copper, ¼ brass, 2 oz.; pure silver, 3 oz.; bismuth, 2 OZ.; saltpetre, 2 OZ.; common salt, 1 oz.; arsenic, 1 oz.; potash, 1 oz.; melt in a crucible with powdered charcoal. This compound was used by a German chemist for unlawful purposes to the amount of thousands, and is so perfect that he was never discovered.