Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 279
Fig. 844.—Centre for a Stone Arch of 20-ft. Span Fig. 845.—View of Jointat A (Fig. 844). Another Method.—The second method ofsetting out an ellipse, illustrated by Eig.841, is probably the best yet devised ; it is LAGGING. 3*2 … Qf~~\ BOLTS WEDGE.3 Fig. 846.—View of Joint at C (Fig. 844), alsoshowing Method of supporting Wedges, etc. done by means of a trammel, which givesa curve by one continuous motion. Thetrammel consists of a wooden cross abcd,each arm. of which is slotted or grooved.In these grooves two small hardwood…
Carpentry · Joinery
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