Miracle concrete: the great modern industry (1909)
Miracle Pressed Stone Co. · Miracle Pressed Stone Co. · leaf 120
hat makes an absolutely evenmixture at all times, regardless of the conditions of thematerial. The spraying pipe is placed over the mixer troughbetween the cement and the stone hoppers and can beconnected to any tank or hydrant by the use of a hoseand two stopcocks. The chains, sprockets and… … 107 MIRACLE HAND-POWER MIXER THE SUMMIT OF PERFECTION. (EXHIBIT M.)
