Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 138
Fig. 46. line, proceed as follows: In Fig. 46 let A and B represent respect-ively a two- and three-pieced elbow for which patterns are desired.First draw a section of the elbow as shown at A in Fig. 47 which r-I t__.
Architecture · Building · Carpentry
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