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Scientific American, Vol. 59, No. 24 (December 1888) (1888)

leaf 3

An illustration from Scientific American, Vol. 59, No. 24 (December 1888), 1888, leaf 3
ther information relative to this invention, formed in any well known manner, with a continuous address Mr. H. L. P. C. Hartmann, care of Paul Brum- Staffordshire Institute of Civil Engineers, took place groove in its periphery, and offset recesses at intervals at the iron foundry of Messrs. J.… … the use of steam boiler or of the machinery being IREDINGTON'S TOOTHED WHEEL. avoided. into aligning offsets on the sides of the wheel, as shown in Figs. 1 and 2. A series of segmental blocks are in- Sending a Soprano's Voice by Express. serted in the groove, the blocks carrying on their outer The…

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