Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 34
ig. 17. Fig. 18. is made tapered and is circriar. The shank fits accurately, andis held in perfect alignment by a small steel key. The clampingscrew is placed upon the side, and keeps the two portions of thesplit socket together. Figs. IT and 18 show that both legs of the compasses arejointed in…
Architecture · Building · Carpentry
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