A practical work-shop companion for tin, sheet-iron, and copper-plate workers ... with numerous valuable receipts and manipulations for every-day use in the work-shop
A trade manual for tin, sheet-iron, and copper-plate workers by Leroy J. Blinn, issued in Philadelphia by H. C. Baird & Co. in 1904 for shop use alongside receipts and working rules. The plates are line diagrams of pattern layouts: lettered points, arcs, radiating construction lines and flattened cone and elbow developments usable as geometric line art.
