Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 304
Fig. 906.—Longitudinal ^Section on A B (Fig. 905). … Fig. 907.—General View of Screw Jack foreasing Principals. Fig. 908.—Transverse Section through a Tunnel,showing Alternative Methods of Centering. 32 ft. for navigation or traffic. The left-handhalf shows ordinary pairs of wedges foreasing and striking, whilst on the rightsimple forms of screw…
Carpentry · Joinery
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