This section is from the "Henley's Twentieth Century Formulas Recipes Processes" encyclopedia, by Norman W. Henley and others.
Old lead........... 4 parts
Grain tin.......... 2 parts
Melt in an iron ladle, and pour out in water, then spread on a dish, and calcine in glost oven with plenty of air.
Granulated tin..... 5 pounds
Niter............. 1/2 pound
Put on saucers and fire in glost oven.
Oxide of Chrome is made by mixing powdered bichromate of potash with sulphur as follows:
Potash............ 6 parts
Flowers of sulphur.. 1 part
Put in saggar, inside kiln, so that fumes are carried away, and place 4 or 5 pieces of red-hot iron on the top so as to ignite it. Leave about 12 hours, then pound very fine, and put in saggar again. Calcine in hard place of biscuit oven. Wash this until the water is quite clear, and dry for use.