The American house carpenter: a treatise upon architecture, cornices and mouldings, framing, doors, windows and stairs. Together with the most important principles of practical geometry (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 23
visionsof the scale. An instrument in the form of a semi-circle, called aprotractor, and used for laying down and measuring angles, isof much service to surveyors, but not much to carpenters. ll.-In drawing p^allel lines, when they are to be parallelto either side of the board, use the T-square;… … Fiff. 2. desired to draw one or more lines. Place any edge, as c d, ofthe set-square even with said line; then place the ruler, g h,against one of the other sides, as c e, and hold it firmly; slidethe set-square along the edge of the ruler as far as it is desired,as at/; and a line drawn by the…
Carpentry · Architecture
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