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Scientific American, Vol. 42, No. 9 (February 1880) (1880)

leaf 3

An illustration from Scientific American, Vol. 42, No. 9 (February 1880), 1880, leaf 3
n this country and improved. Only two gears and one driving pulley are now in Europe a successful positive blast rotary blower. try has improved, arid we are informed that to day the used. The gears are cut in the most perfect manner, and are Messrs. Roots have more orders than they can promptly In… … blowers up to the standard of first class beginning it has expanded until it is known INTERIOR OF FOUNDRY. machines. As the inventors were already all over the world. The works, which are in many respects receiving many orders, they decided on com- fill, and are constantly increasing their force to…

Patents · Improved · Pressure · Cement · Patented · Scientific American · Boiler · Pumping system · Patent issued · American export · Rotary pressure · Practical treatise · Carbonic acid · Export edition · Oxalic acid · Low pressure

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