. 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. Q R 720. ORE ROASTING FURNACE. Straight line type. ore enters from a spreading hopper at one end and is drawn by rabbles with teeth for alternate turning over of the oreduring its passagealong the furnace bedto the discharge rabbles are at-
. 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. Q R 720. ORE ROASTING FURNACE. Straight line type. ore enters from a spreading hopper at one end and is drawn by rabbles with teeth for alternate turning over of the oreduring its passagealong the furnace bedto the discharge rabbles are at-tached to a chain carrier and returned on the outside of the furnace grates are on the outside, distributed for equahzing theheat which passes off through a chimney at the feed hopper end. 721. MAGNETIC METAL SEPA-RATOR. For separating iron turn-ings, fihngs, and chips from brass com-position or other non-magnetic material. The drum is composed of the facesof a large number of magnets. Theiron adheres to the magnets and iscarried around the cylinder to a revolv-ing brush, w^hile the non-magnetic ma-terial drops from the front of the drumto a 278 MINING DEVICES AND APPLIANCES.
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
