This section is from the "Henley's Twentieth Century Formulas Recipes Processes" encyclopedia, by Norman W. Henley and others.
Alloy of tin and zinc; harder than tin and softer than zinc: Zinc, 1 part; tin. 11 parts.
Dissolve finely cut isinglass in a little water with moderate heat, which must
not be increased to a boil, and add as much nitric acid as has been used of the isinglass. The adhesive will not penetrate the cardboard or paper.