| I | II | III | IV | |
|---|---|---|---|---|
| Bismuth | 6 | 5 | 2 | 8 |
| Tin | 3 | 2 | 1 | 3 |
| Lead | 13 | 3 | 1 | 5 |
V.—Cliché Metal.—This alloy is composed of tin, 48 parts; lead, 32.5; bismuth, 9; and antimony, 10.5. It is especially well adapted to dabbing rollers for printing cotton goods, and as it possesses a considerable degree of hardness, it wears well.
VI.—For filling out defective places in metallic castings, an alloy of bismuth 1 part, antimony 3, lead 8, can be advantageously used.
VII.—For Cementing Glass.—Most of the cements in ordinary use are dissolved, or at least softened, by petroleum. An alloy of lead 3 parts, tin 2, bismuth 2.5, melting at 212° F., is not affected by petroleum, and is therefore very useful for cementing lamps made of metal and glass combined.
LIPOWITZ’S BISMUTH ALLOY: See Cadmium Alloys.
Brass.
In general brass is composed of two-thirds copper and one-third zinc, but a little lead or tin is sometimes advantageous, as the following:
I.—Red copper, 66 parts; zinc, 34 parts; lead, 1 part.
II.—Copper, 66 parts; zinc, 32 parts; tin, 1 part; lead, 1 part.
III.—Copper, 64.5 parts; zinc, 33.5 parts; lead, 1.5 parts; tin, 0.5 part.