Miracle concrete: the great modern industry (1909)
Miracle Pressed Stone Co. · Miracle Pressed Stone Co. · leaf 11
when the mixture has had the proper amount of tamping.After the material is compact further tamping is a waste ofenergy. For the same reason, blocks made under enormous pressureinstead of by tamping, are without further advantages, and aremore expensive. Pressure will not make a good stone, the… … There is satisfaction in knowing that others are satisfied. Begin beforethe otherfellow does. Illustration No. 2—Tamping. made compact at the top, bottom and all sides, in thin layers.These layers effectually form a seal and prevent the air on theinside from escaping and the air is compressed as…
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