2. Brass, 2 parts; zinc, 1 part; as before.

3. Brass, 3 parts; zinc, 1 part. Very strong. Used for soldering tubes and

other like purposes requiring great strength. The above alloys form the

'HARD SOLDER' of the braziers. For certain purposes a little silver is

added to them, when the compound receives the name of 'SILVER-SOLDER,'

_i._ For TURNING:--1. Fine brass, 98 parts; lead, 2 parts; melted

together.

Cooley's Cyclopædia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I · 第 147 / 428 题