3. Copper, 65 parts; zinc, 33 parts; lead, 2 parts.

_j._ For WIRE:--1. Copper, 72 parts; zinc, 28 parts; the resulting alloy

being subsequently properly annealed.

Cooley's Cyclopædia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I · 第 149 / 428 题