Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 181
Fig. 64. plane, and parallel to the direction of the ray of light, in such aposition as to cut all the surfaces of the pyramid, as shown in 139 48 MECHANICAL DRAWING elevation. This plane is i^erpendicular to the Vertical plane; hencethe section it cuts from the pyramid is readily found in plan… … Fig. 65. Fig. 66. Via. G7.
Architecture · Building · Carpentry
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