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Scientific American, Vol. 48, No. 13 (1883) (1883)
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bushels of animal charcoal off the water from the valve, B, and permits it to enter would cost about $150. The sand will last for many years through the small valves, F, which are distributed at regu- without deterioration, while the charcoal, which while fresh, lar. intervals in the bottom of the… … THE HYAIT FILTER NO. 2, (Continued on page 198.) dition by the portion of sand © 1883 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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