"Quartz" Quotes from Famous Books
 ... Castlemaine. Ballarat was nearly deserted for a time after the placer mining gave out, and the same was the case at the other places mentioned. Then the reefs and ledges were attacked; crushing machinery was erected, and the form of work which you call quartz mining in America had its beginning. It has gone on steadily ever since and gives employment to a great many people. It also employs a great deal of money, as quartz mining requires capital, while ...
— The Land of the Kangaroo - Adventures of Two Youths in a Journey through the Great Island Continent • Thomas Wallace Knox
... can be easily transported up country, and has for this reason been found most useful for prospecting. For alluvial mining it will throw a powerful jet at 100 lb. to 120 lb. pressure, or by means of a belt will drive an experimental quartz crusher or stamp mill. The power developed is six horses, and the boiler will burn wood or other inferior fuel when coal is not obtainable. The pump will deliver 100 gallons per minute, on a short length of hose or piping, and will force water ...
— Scientific American Supplement, No. 1178, June 25, 1898 • Various
... 8 ft. long, coincident with the center line of the conduit, is cut in the stack. A vertical plane drawn through the center line of the bore-hole of the cannon and that of the slit, if produced, intersects the center line of a quartz lens, and coincides with the center of a stenopaic slit and the axis of the revolving drum carrying the film. The photographing apparatus consists of a shutter, a quartz lens, and a stenopaic slit, 76 by 1.7 mm., between the ...
— Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 • Herbert M. Wilson
... come to immense beds of quartz, but the rare brilliancy of the whole scene set me to work to ascertain the value of these stones. To my astonishment, I found that the shining mountains and valleys were filled with genuine diamonds and precious stones, some of which are very rare according to our classification. ...
— Life in a Thousand Worlds • William Shuler Harris
... ruins found here, the early use of stone for architectural purposes is clearly manifested, and there are innumerable relics of ingenuity in periods upon which we are apt to look with great contempt. Arrow-heads made of flint, quartz, agate and jaspar, can easily be found by the relic hunter. Hatchets made of stone, and sharpened in a most unique manner, are also common, and the ancestors of the Pueblos undoubtedly used knives made of stone hundreds of ...
— My Native Land • James Cox
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