The American house-carpenter; a treatise on the art of building, and the strength of materials (1873)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 384
ng through three given points in its curved surface:one perpendicularly over 6, at then-eight, bj; one perpendicu-larly over s, at the height, s x ; and the other over c, at the height,c I—these lines being drawn at right angles to the chord of thebase, b c. From^, through /, draw a line to meet… … plane of the base. This line can be proved to be the intersectionof these planes in another way ; from 6, through s, and from j,through .r, draw lines meeting at m ; then the point, m, will bein the intersecting line, as is shown in the figure, and also atFig. 324. From/, draw/p, at right angles…
Carpentry · Architecture
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