The American house-carpenter; a treatise on the art of building, and the strength of materials (1867)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 88
difference of thesquares of the radius and abscissa, less the difference of theradius and versed sine. This may be expressed algebraicallythus : y = -x/r^ — x — {r — v), where y is the ordinate, r theradius, x the abscissa, and v the versed sine ;—d n being theabscissa of the ordinate n m, d g the… … 167.—Proposition. The sides of any quadrangle beingbisected, and lines drawn joining the points of bisection in theadjacent sides, these lines will form a parallelogram. Drawthe diagonals, a l and c d^ {Fig. 118.) It will here be per-ceived that the two triangles, a e o and a g d^ are…
Carpentry · Architecture
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