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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 144

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 144
> cQ^ … ^ .Off ently, it shows how degrees may beobtained with the square. Thedivisions show the degrees from 50to 900, with the exact figures onthe tongue necessary to producethe same. This diagram is alsouseful in roof work. For exam-ple, if a pitch of 250 is wanted, use12 on the blade and 5^ on…

Carpenters' squares · Architecture, Domestic · Equerre de charpentier

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