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 163
i6o PRACTICAL USES OF that if 12 and 12 on the square, when laid downon a line, make an angle of 45° on the lines ofeither blade or tongue, why 6 and12, when laid down on the sameline, do not make a miter for anoctagon. The reason why 12and 6 will not give the cut foran octagon (200 30), when 12and… … Fig. 119 steel square for any acute angle: Take anylength on the blade as radius, then the lengthon the tongue will equal the tangent of the re-quired angle. The accompanying diagram, Fig.119, illustrates the principle. A few examples furnished me by Mr. A. W. THE STEEL SQUARE 161 Woods, and which…
Carpenters' squares · Architecture, Domestic · Equerre de charpentier
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