A practical workshop companion for tin, sheet iron and copper plate workers : containing rules for describing various kinds of patterns used by tin, sheet iron and copper plate workers : practical geometry, mensuration of surfaces and solids, tables of the weights of metals, lead pipe, etc., tables of areas and circumferences of circles : japans, varnishes, lackers, cements, compositions, etc., etc., etc.
A trade manual by Leroy J. Blinn, published in Philadelphia by Henry Carey Baird & Co. in 1876 for tinsmiths and sheet-iron and copper-plate workers laying out patterns at the bench. The plates are line diagrams: lettered construction points, radiating arcs, numbered divisions, and flattened cone and elbow developments, useful as geometric line art and technical ornament.
