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 25
Fig. 12. Protractor. 12. The protractor is shown in Fig. 12. Thisinstrument, while not in such constant use assome of the others, is nevertheless necessary at … Fig. 12a. Semicircular German Silver Protractor, with HornCenter and Movable Arm. times. It is made of various substances, suchas metal, celluloid, cardboard, etc., and is usedfor laying out angles which cannot be obtainedwith the triangles and which cannot be easilyconstructed geometrically. The…
Architecture · Building
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
