215 CARBORUNDUM. Westinghouse alternating dynamo, with the various luminous rays over a very wide surface. They like-Carborundum, the new abradent, according to the special pieces of machinery necessary for working up wise contain a reservoir of compressed air, which is inventor or discoverer, is the result of both invention the new material. connected by a flexible tube with the tube that bor and discovery. It was produced after long research Our front page engraving illustrates the various
... 'S the top of the net. The flexible tube is provided and car�ful and intelligent experimentation, and in steps in the manufacture of carborundum, and gives with a three-way cock that puts the interior of the its production the inventor made the important dis-a faithful portrait of its persistent inventor. . net tube in connection with the interior of the air covery that carbon and silica would, under favorable Ordinary Connellsville coke is used, being crushed reservoir, or with the external air, or prevents egress of conditions, combine to form a definite compound and ground in barrels to a fine powder. A good qual-the air. This cock is maneuvered by hand or by a which was hitherto unknown. ity of glass sand and ordinary dairy salt are mixed clockwork movement started electrically and inclosed Mr. E. G. Acheson, the fortunate inventor of the with the coke, the proportions in some cases being: in the buoy. This clockwork movement may also be new abradent, made his first experimfmts in this Coke, 20 parts; sand, 25; salt, 5 parts. This mixture is controlled from the shore or from a boat. direction in the laboratory of Mr. T. A. Edison, when placed in the furnace and subjected to the intense The bait employed (worms, frogs, small fish, etc.) is that institution was located at Menlo Park, N. J. heat produced in a central core of carbon by the pass-placed in a basket having several compartments and These experiments, which were productive of small age of a current of electricity. This core, formed of which is suspended from the luminous buoy.