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Scientific American, Vol. 29, No. 15 (1873) (1873)

leaf 3

An illustration from Scientific American, Vol. 29, No. 15 (1873), 1873, leaf 3
es. Its contents have been courteously sent to us. the bearings and creating noise. The lateral strain upon oe —________ shafts being as their distances from the center at which the SPRAGUE’S COMBINED SASH LOCK, SASH HOLDER, AND WEATHER STRIP. power is applied, it is evident that the strain upon… … against shouldered sockets, pair of spur wheels, is used. WOOD BORING MACHINE. so that the movement of These wheels are engine the piece, as regards sash and frame, may be regulated. The being dead black and white, are formed by printing adver- cut, and may run at any speed required. The spindles…

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