Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 141
Fig. 49. Fig. 50. \J. used in furnace-pipe work and are usually made from bright tin.Note the difference in the position of the sections of the twoelbows. In Fig. 49 a h is in a vertical position, while in Fig. 50 itis in a horizontal position. In obtaining the patterns the same ^—^ 7. rule is…
Architecture · Building · Carpentry
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