. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 725. AUTOMATIC ORE SAMPLER. The revolving hopper has one or more smallaprons in its periphery which divert a smallportion of the ore passing through the samplerto the sample spout. The ore is still furthercrushed and passed through a second andthird sampler, so as to
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 725. AUTOMATIC ORE SAMPLER. The revolving hopper has one or more smallaprons in its periphery which divert a smallportion of the ore passing through the samplerto the sample spout. The ore is still furthercrushed and passed through a second andthird sampler, so as to obtain a fair sample tothe one hundredth or more 726. PNEUMATIC CON-CENTRATOR. The vibrationof the vanner and concentra-tion of gold sands is done byshort, quick strokes of airpumps or bellows beneath thetable which are operated by thecrank shaft. 28o MINING DEVICES AND APPLIANCES.
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
