*pe of interest to some core drill, black diamonds were valued at $3 a karat; The arrangement of the drill and its accessories is now they are rated at $50. This advance is attributa- shown in the accompanying engraving. The hollow of our readers. It will be seen from our illustration ble, not to a… … of water flows with great strength up as far as the top of the calyx, but here it will be ob- Fig, 1.—THE HAMMER IN USE. served that the annular space widens consider- ably, so that the current is reduced and the sludge it which transmits the requisite power from a small carries drops by gravity…
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