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Show Largest Rock Crusher. Tho largest rock crusher In tho world was recently thrown Into operation opera-tion in a coment mill at South Pittsburg. Pitts-burg. Tenn., and it crushes all the rock used by a 4,000-barrel plant Tho machine has an hourly capacity of 800 tons and CO per cent, of the product 13 In pieces four inches or lees and 30 per cent, in pieces ten inches or less. The crusher is 10 feet in height and weighs 425,000 pounds. The hopper ia 20 feet in diameter. The operation of this machine alono requires 29 horsepower. |