Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 141
Fig. 20.we may use the 45° triangle with the T-square to determinethe liglit and dark surfaces, and hence the shade lines. Ifthe object stands on the horizontal phme, the 45° triangle is usedon the plan, as shown in Fig. 21, but if the lengtli is perpen-dicular to tlie vertical plane, the 45°…
Architecture · Building · Carpentry
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