The Tinsmith's Helper and Pattern Book - With Useful Rules, Diagrams and Tables #224579

The section on Mensuration will be found both accu rate and complete and the rules and examples are reduced to the plainest language so that any one may understand them. Realizing the value of reliable data, he included all the tables of weights of materials, measures of area, capacity, etc., to which the sheet metal worker has occa sion to refer, together with many excellent recipes, formulas and rules, which will be found of great service.