Is composed of tin (2 parts), lead (4 parts), cadmium (1 to 2 parts), bismuth (5 to 8 parts).
(1) 67 4-10 parts Copper, 26 8-10 parts Zinc, 5 8-10 parts Aluminum.
(2) 67 parts Copper, 30 parts Zinc, 3 parts Aluminum.
(3) 71 parts Copper, 27 5-10 parts Zinc, 1 5-10 parts Aluminum.
(4) 57 parts Copper, 42 parts Zinc, 1 part Aluminum.
(5) 70 parts Copper, 27 5-10 parts Zinc, 2 5-10 parts Aluminum.
The aluminum process for the decoration and preservation of iron and steel is intended to take the place of nickeling, tinning and coppering. The coating leaves the sharpness of the outline unimpaired and adheres closely to cast and wrought iron.
Arrington amalgam is composed of the following: Silver, 40 per cent.; tin, 60 per cent.
Diamond amalgam is composed of the following: Silver, 31.76; tin, 66.74; gold, 1.50.
Hood's amalgam is composed of the following: Silver, 34.64; tin, 60.37; gold, 2.70; iron, 2.90.
Johnson & Lund's amalgam is composed of the following: Silver, 38.27; tin, 59.58; platinum, 1.34; gold, 0.81.
Lawrence's amalgam is composed of the following: Silver, 47.87; tin, 33.68; copper, 14.91; gold, 3.54.
Pure lead and grain tin each 1 ounce. Melt in a clear ladle and immediately add 1 ounce bismuth. Skim off the dross, remove the ladle from the fire, and before the metal sets add 1 ounce quicksilver. Stir the compound well, aviding the fumes evolved.
Townsend's amalgam is composed of the following: Silver, 40.21; tin, 47.54; copper, 10.65; gold, 1.6.
Townsend's improved amalgam is composed of the following: Silver, 39.00; tin, 55.65; gold, 5.31.
Silver, 34.89; tin, 60.01; platinum, 0.96; gold, 4.14.
Ammonia ferrous sulphate is made by the dissolution, in an extremely small quantity of water, of:
60 parts Ammonium-sulphate, 139 parts Ferrous sulphide.
The solution is heated to 140 degrees Fahrenheit, then poured into a porcelain dish, to which a few drops of sulphuric acid are added, the mass being stirred until cool. The deposition of a pale-blue crystalline meal ensues. This is dried 24 hours afterward in a funnel, the tube of which is to be closed by a tuft of cotton.
The pieces of steel to be annealed are heated very slowly, and when at a low, red heat they are placed between two dry boards and then screwed up tight in a vise. The steel burns its way into the boards, and as they come together around it an air-tight charcoal bed is formed. On this cooling the steel is found thoroughly annealed. Another method of annealing steel is to heat same to a dull red heat, cover it with dry, warm sand, and leave it to cool slowly. It may also be heated and covered up in a forge fire and left there until the fire is out.
A third method is to heat the steel red hot until evenly heated, then removing it from the fire to some dark place and let it cool until the dull red can be no longer seen in the darkness. The steel is then cooled in cold water.