. 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. 729. DRY GOLD MINING MACHINE. The hand crank wheel, the vibrator, and theblower for blowing off the dust and sand fromthe riffle table are the leading features of thisnovel dry placer machine. Gold sand is fed tothe hopper above and shaken in a thin sheet tothe riffle
. 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. 729. DRY GOLD MINING MACHINE. The hand crank wheel, the vibrator, and theblower for blowing off the dust and sand fromthe riffle table are the leading features of thisnovel dry placer machine. Gold sand is fed tothe hopper above and shaken in a thin sheet tothe riffle through a blast of air. Air is also blownthrough the sieve sections pushing the sand for-ward and holding the gold. MINING DEVICES AND APPLIANCES. 281. 730. GOLD AMALGAMATOR. a, the circular tank with sluicewaysfor overflow of the waste slimes. c,c, revolving stirring arms drivenby the gear and center shaft throughthe conical center standard of thetank. The amalgamated plates ormercury rests on the bottom of thetank. m, f, perforations in the disk car-rying the stirring arms, for equal dis-tribution of the ore sHmes upon themercury bed. 731. Section showing gearing, ele-vating screw and stirring arms. 732. SHEAVE WHEELS FOR GRAVITY PLANES. The frontwheel is made smaller than the rear wheel (usually about 10 inches) so as to allow the -7^m>
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
