For Lead the solder is 1 part tin, 1 to 2 of lead; -- for Tin 1 to 2 parts tin to 1 of lead; - for Zinc 1 part tin to 1 to 2 of lead; -for Pewter 1 part tin to 1 of lead, and 1 to 2 parts of bismuth.

The surfaces to be joined are made perfectly clean and smooth, and then covered with sal-ammoniac, or resin, or both; the solder is then applied, being melted in, and smoothed over by the soldering iron.

To Joint Lead Plates. - The joints of lead plates for some purposes are made as follows: - The edges are brought together, hammered down into a sort of channel cut out of wood, and secured with a few tacks. The hollow is then scraped clean with a scraper, rubbed over with candle grease, and a stream of hot lead is poured into it, the surface being afterwards smoothed with a red-hot plumber's iron.

Tinning Iron

Cleanse the metal to be tinned, and rub with a coarse cloth, previously dipped in hydrochloric acid, (muriatic acid) and then rub on French putty with the same cloth. French putty is made by mixing tin filings with mercury.

A Good Solder

Take 1 lb. of pure Banca tin, and melt it, then add half a pound of clean lead, and when it is melted, stir the mixture gently with a stick or poker, and pour it out into solder strips.