Miracle concrete: the great modern industry (1909)
Miracle Pressed Stone Co. · Miracle Pressed Stone Co. · leaf 120
strain off the engine. We use separate clutch forstopping and starting the feed mechanism, hence bysimply changing the sprocket wheels, as shown in thetable which we furnish, we can get any mixture that isdesired. All that is necessary to get a proportionatemix is to regulate or proportion the…
