Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 42
o <o 1-1 00 S ^ U « «OBH _3 fl fe to < Ct( ;« cfl u 5 MECHANICAL DRAWING 17 which carry the pen or pencil and the needle point are clamped to awooden beam at a distance equal to the radius of the circle. The
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-781-513.webp)
