XXII.—Buttonmakers’ Common Brass.—Button brass, 6 parts; tin, 1 part; lead, 1 part. Mix.
XXIII.—Mallet’s Brass.—Copper, 25.4 parts; zinc, 74.6 parts. Used to preserve iron from oxidizing.
XXIV.—Best Brass for Clocks.—Rose copper, 85 parts; zinc, 14 parts; lead, 1 part.
Gold Alloys:
See also Gold Alloys, under Alloys.
Gold of 22 carats fine being so little used is intentionally omitted.
I.—Gold of 18 Carats, Yellow Tint.—Gold, 15 pennyweights; silver, 2 pennyweights, 18 grains; copper, 2 pennyweights, 6 grains.
II.—Gold of 18 Carats, Red Tint.—Gold, 15 pennyweights; silver, 1 pennyweight, 18 grains; copper, 3 pennyweights, 6 grains.
III.—Spring Gold of 16 Carats.—Gold, 1 ounce, 16 pennyweights; silver, 6 pennyweights; copper, 12 pennyweights. This when drawn or rolled very hard makes springs little inferior to steel.
IV.—Jewelers’ Fine Gold, Yellow Tint, 16 Carats Nearly.—Gold, 1 ounce; silver, 7 pennyweights; copper, 5 pennyweights.