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 42
and b ; move the angular point, c, inthe direction, a c b ; keeping the edges of the triangle hardagainst the pins, a and b ; a pencil held at c will describe thearc, a c b. If the angle formed by the rulers at c be a right angle, thesegment described will be a semi-circle. This problem is usefulin… … 26 AMERICAN HOUSE-CARPENTER. 88. To describe the segment of a circle by intersection of lines. Let a b, (Fig. 47,) be the chord, and c d the height ofthe segment. Through c, draw c/, parallel to a b ; draw b /atright angles to c b ; make c e equal to c /; draw a g and b h,at right angles to a b ;…
Carpentry · Architecture
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