Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 14, 2025
More probable is it as has already been indicated that the analogy of the rock-drill in mining work will be followed. The farmer will use an implement much smaller and handier than a movable steam-engine, but supplied with power from a central station, either on his own land or in some place maintained by co-operative or public agency.
For different grades of land, of course, different modes of working are advisable, the ordinary plough of a multifurrow pattern, with stump-jumping springs or weights, being used for land which is not too heavy or clayey; a disc plough or harrow being applicable to light, well-worked ground; and the mechanical spade or fork-digger reciprocating in its motion very much like the rock-drill having its special sphere of usefulness in wet and heavy land.
The electric rock-drill is now winning its way into the mines which are ventilated with comparative ease as well as into those which are more difficult to supply with air. It is plain, therefore, that on its merits as a conveyer and storer of power the electric current is preferable to compressed air.
It was because he himself was away on a business journey and Falkman had neglected to take elementary precautions that the big rock-fall occurred in the tunnel, killing four men, and destroying the new Belgian rock-drill, that had cost a good hundred thousand, before it had begun to work. This sort of thing was not faulty calculation it was malicious fate. "Come up, boy!
Fans driven by electric motors already offer a better solution of the ventilation difficulty, and the advantages on this side are certain to increase rather than to diminish during the next few years. The electric rock-drill, which can already hold its own with that driven by compressed air, is therefore bound to gain ground in the future.
Word Of The Day
Others Looking