Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 50
H … Fig. 23. Frames. of the edges and all the lines drawn upon them. The tracingsillustrate the following; rule: Rule 24. In representing the regular frames, the anglesof the inner figure must he in straight lines passing from theangles of the outer figure to the center. These lines are alti-tudes or…
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
