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Show Largest Rock Crusher In Operation. Tho largest rock crusher In tho world was recently thrown into operation opera-tion In n cement mill at South Pittsburg, Pitts-burg, Tenn., nnd It crushes ull tho rock used by a 4,000-barrol plnnt Tho machine has nn hourly capacity of 800 tons and CO per cent of tho product Is In pieces four Inches or less and 30 por cent, in pieces two inches or lesB. Tho crushor Is 19 foot in height and wolghs 42G.O0O pounds. Tho hopper is 20 feet in dinmetor. Tho operation of this machino alono requires 29 horso power. |