The chapter of tables contains practically all the data the sheet metal worker requires, from the weight of iron and steel, copper, brass and aluminum sheets and bars, to the capacities of cylinders and rectangular tanks in U. S. Gallons. Our Canadian and English friends will find complete tables of capacities based on their standard Imperial gallon. The metric equivalents of all our measures are also given. The chapter on Recipes and Formulas gives the mixtures for all the soft and hard solders, solder ing ?uxes, cements, putties, inks for making sheet metal work, rust preventives, etc.