OCR Text |
Show rTT-s-aWffc------- -- ---- AUGUR FOR DRILLING SALT Compressed Air Furnishes the Power for Working the Device Which. Mines Mineral. In Muskegon, Mich., salt is used in lmge quantities, aud, consequently, tho v.uiuiionsts of the tltms dialing in It am capacious enuugti tu store uwuy a totisifetrablo supply, taja Teihmcal World. As Is wcu i,nosu, salt, ou lie-cujd( lie-cujd( ot Us atllnity tor water, Is a sub-suince sub-suince tbat has a tendency to harden aud eaiio when plied uway any lengtn ot time, ana some of the cellars wnerc it is stored contain bcus ot It Oieet higt und su naid mui but little impression can be made upon iiicm even with tnu pick or ax. For this icaton a somewhat curious device has been brought into u:e to loosen the material to that it can reauny no secured. '1 his tu u large bo:-ing bo:-ing tool, or aucur, which Is operated b) compressed air. The uugur ts mounted en a wheeled truck, which is suidia ny hanoles projecting from the rear of tho irumenuru. The rear end of the uugur tevoUcs In a socket titled Into the truiuu-work, truiuu-work, while tho air la admitted to the toci.ei trom the hose whlih supplies it When operated the boring tool isputhcd against the mass of salt and ihe-augMr Is set in motion and In a minute or two. to rapidly docs the tool work, a holo about live Inches In diameter Is made in the formation the entire length or the augur. Then another hole Is drilled par allel with tho first, and another, until the pile has been undermined, so to speak, when its contents can easily be broken out. Tho advantage of this method meth-od Is seen when It Is said that two men can get out as much salt by tho power method as two dozen men by using picks and shovels. |