Radford's cyclopedia of construction; carpentry, building and architecture. Based on the practical experience of a large staff of experts in actual constrcution work (1909)
Johnson, Alfred Sidney, 1860-, Radford, William A., 1865- · Chicago Radford Architectural Co · leaf 28
blade is the working edge,as shown in Fig. 13. A good T-square shouldhave a perfectly straight working edge, astraight working edge also for the head, and nomotion between head and blade. The mostaccurate T-squares are made of steel, but verysatisfactory ones are made of wood—some with MECHANICAL…
Architecture · Building
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
