. A civic biology : presented in problems. Biology; Sanitation. MAX'S IMPROVEMENT OF HIS ENVIRONMENT 385. Filter beds at Albany, N. Y. sewage from cities above them on the river has flowed. Filter- ing such water by means of passing the water through settling basins and sand filters removes about 98 per cent of the germs. The result of drinking unfiltered and filtered water in certain large cities is shown graph- ically at right. In cities which drain their sewage into rivers and lakes, the question of sewage disposal is a large one, and many cities now have means of dis- posing of their sew-
. A civic biology : presented in problems. Biology; Sanitation. MAX'S IMPROVEMENT OF HIS ENVIRONMENT 385. Filter beds at Albany, N. Y. sewage from cities above them on the river has flowed. Filter- ing such water by means of passing the water through settling basins and sand filters removes about 98 per cent of the germs. The result of drinking unfiltered and filtered water in certain large cities is shown graph- ically at right. In cities which drain their sewage into rivers and lakes, the question of sewage disposal is a large one, and many cities now have means of dis- posing of their sew- B 60 100 120 140 160 160 ZOO 220. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hunter, George W. (George William), 1873-1948. New York : American Book Company
Size: 2434px × 1027px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookpublishernewyorkamericanbookcompany, booksubjectbiology
