Modern carpentry and joinery : being a compilation of the very best things and most modern and practical methods known in the arts of carpentry and joinery (1910)
Hodgson, Frederick Thomas, 1836- · Chicago : F. J. Drake & Co. · leaf 77
fall from the central pointp will give the minor axis. To obtain the projections of the parabola, morepoints are required, such as r, 2, s, 3, h, but the mode 74 MODERN CARPENTRY of procedure is the same as for the ellipse. The ver-tical projection of the parabola u s h t u is shown atu s h t u.… … Let ADB (Fig. 44) be the vertical projection ofthe cone A C B the horizontal projection of half itsbase, and E F the line of section. From the points Eand F let fall on AB the perpendiculars EG, FH. SOLID GEOMETRY 75 Take any points in E F, as k, 1, m, n, &c., and fromthem draw lines parallel…
Carpentry
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