attacked by air. A num- 100,000 population, taken from ber of experiments have thus been made with the chromous American cities, on an average of seven years was 42 cases, where salts ; with a soda solution, for water was taken from lakes. instance, a hydrate was obtain- An average of, five… … use at the dam, two C. While the fer- and a half miles nearer the city, and on a large de- rous salts give off the gas absorbed upon heating or in vacuo, the salts of chromium retain it, and a posit of filtering sand beside the river. About two of $29,000. It is run by a 300 K. W. synchron- years…
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