Artesian Wells As a Means of Water Supply Including An Account of the Rise Pro
Artesian Wells As a Means of Water Supply Including An Account of the Rise Pro
Walter Gibbons Cox
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It would appear at first sight that this process is a slow one, but with a due degree of velocity given to the turning of the tool it is, in fact, much more rapid than the ordinary method of breaking the rock by percussive or falling tools. The dia- mond drill is capable of piercing the hardest rocks ; even emery has been bored at the rate of two inches per minute. The rate of progress during actual boring is from two to three inches per minute. In soft strata such as clay, sand and other alluv...ial deposits this drill is worse than useless. When these strata are met with other tools must be employed until the hardest rocks are again met with. It must also be observed that the borings made by this machine are of a comparatively small diameter. The next consideration in connection with this subject is that of the best mechanical means at our disposal for accomplishing the purpose in hand obtaining artesian water. The geological features of the subject, however scientifically and fully they may be treated, however able an account may be given of the physical characteristics of the country, can be at this early stage of the development of artesian water supplies in Australia at the best no more nor less than speculative gene- ralisations.
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