Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 28
Triangles aremade of various substances suchas Avood, rubber, celluloid andsteel. Wooden triangles are cheap but are likely to warp and get out of shape. The rubber tri-angles are frequently used, and are in general satisfactory. Thetransparent celluloid triangle is, however, extensively used on…
Architecture · Building · Carpentry
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