 ... a reliable purifier of water tainted with animal impurities. Among other purifying agents may be mentioned, distillation, the exposure of water in minute divided currents to the air, the immersion of pieces of charcoal or of iron wire, and the effects...  A Manual of Civil Engineering - Page 723by William John Macquorn Rankine - 1883 - 808 pagesFull view - About this book
 | George Wilson - Hygiene - 1873 - 438 pages
...to the air, the immersion of pieces of charcoal or of iron wire, and the effects of plants and fish. In store reservoirs, the presence of a moderate quantity of living plants exerts a decidedly purifying influence, while the destruction of fish has been followed by an excessive... | |
 | George Wilson - 1873 - 454 pages
...to the air, the immersion of pieces of charcoal or of iron wire, and the effects of plants and fish. In store reservoirs, the presence of a moderate quantity of living plants exerts a decidedly purifying influence, while the destruction of fish has been followed by an excessive... | |
 | Reginald Craufuird Sterndale - Sanitation - 1881 - 312 pages
...plants ; " and again, " among other purifying agents may be mentioned the effects of plants and fish." In store reservoirs, the presence of a moderate quantity of living plants exerts a decidedly purifying influence, while the destruction of fish has been followed by an excessive... | |
 | Edward Franklin Smith - Anatomy - 1898 - 236 pages
...to the air, the immersion of pieces of charcoal or of iron wire, and the effects of plants and fish. In store reservoirs, the presence of a moderate quantity of living plants exerts a decidedly purifying influence, while the destruction of fish has been followed by an excessive... | |
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