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A practical treatise on the steel square and its application to everyday use : being an exhaustive collection of steel square problems and solutions, "old and new", with many original and useful additions, forming a complete encyclopedia of steel square knowledge, together with a brief history of the square, and description of tables, keys and other aids and attachments (1903)

Hodgson, Fred. T. (Frederick Thomas), 1836-1919 · Riverside, Ill. : Radford Architectural Co. · leaf 90

An illustration from A practical treatise on the steel square and its application to everyday use : being an exhaustive collection of steel square problems and solutions, "old and new", with many original and useful additions, forming a complete encyclopedia of steel square knowledge, together with a brief history of the square, and description of tables, keys and other aids and attachments, 1903, leaf 90
and move the blade till it touches the other5-inch mark at a. Froma to c is found the length,which multiplied by 3 givesthe hypothenuse. To Lay Off an Octagon ina Square, Fig. 4.7.—Draw the diagonals e and f.Mark off the distance from the corner to thecenter^ on all sides, measuring from the…

Carpenters' squares · Architecture, Domestic · Equerre de charpentier

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