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 44
he horizontalplane will give d3, the horizontal projection of theextremity of the arris C d; for as the summit d movesin the same plane as C, parallel to the vertical plane SOLID GEOMETRY 41 of projection the projection of the summit will evi-dently be in the prolongation of the arris C d, whichis… … Fig. 21. from d let fall a perpendicular cutting the prolonga-tion of the arris C d in d3, and from c a perpendicularcutting the same line in c2; join B c2, A c2, B d3, A d3.The following is a more general solution of theproblem: Let ABCd (Fig. 22), be the horizontalprojection of a pyramid resting…
Carpentry
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