Miracle concrete: the great modern industry (1909)
Miracle Pressed Stone Co. · Miracle Pressed Stone Co. · leaf 40
trength and durability are its strongfeatures, and it will last a life timeunder ordinary conditions. The cores are bolted onto a bedplate and are raised and lowered witha foot lever which does away with thenecessity of cogs and gears, that areliable to clog and collect cement. The machine is… … SHOWING CLOSED MACHINE 31
