Miracle concrete: the great modern industry (1909)
Miracle Pressed Stone Co. · Miracle Pressed Stone Co. · leaf 128
t so it is handled with ease. It requires but one horsepower to operate, andstrikes 580 blows per minute. It insures uniform tamping from morning to night and every day in the year. The standard frame is 1 2 ft. long, plunger 5 ft. long with 1 J inch stroke, weighs 200 lbs. withoutcounter weight.… … The Greatest Time and Labor Sav-ing Device in Concrete Manufac-turing ever Placed on the Market.
