ffords a bright blue so- ble to get a square up to the shank of the tap, and it the two wheels, A A}, in Fig. 2, runs another pulley, lution. Very small quantities of it have as yet been would be found useful in almost every operation for C, which is fitted to revolve loosely upon the shaft.… … Fah. The other four belts C, which, being loose, were kept warm all night and protected during testing. of course transmits no motion. valuable to those who may own the mines. Vana- Three of the ten bolts were tested with gradual, and sary to run quite slowly or to start easily, the dium forms a…
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