XXI.—Tin, 8.5; antimony, 10; copper, 5 parts.
XXII.—Tin, 42; antimony, 16; lead, 42 parts.
XXIII.—Tin, 72; antimony, 26; copper, 2 parts.
XXIV.—Tin, 81; antimony, 12.5; copper, 6.5 parts.
White Metals Based On Copper.—
I.—Copper, 65 parts; arsenic, 55 parts.
II.—Copper, 64 parts; arsenic, 50 parts.
III.—Copper, 10 parts; zinc, 20 parts; nickel, 30 parts.
IV.—Nickel, 70 parts; copper, 30 parts; zinc, 20 parts.
V.—Nickel, 60 parts; copper, 30 parts; zinc, 30 parts.