2. Copper, 7 parts; zinc, 3 parts. Bright yellow; malleable.

3. Fine copper, 4 parts; zinc, 1 part. Deeper coloured than the last; an

excellent and very useful alloy.

_b._ MALLEABLE BRASS:--1. Copper, 33 parts; zinc, 25 parts; as before.

Cooley's Cyclopædia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I · 第 142 / 428 题