STUDIES IN BACTERIA.
Cohoes, N. Y., having been empowered by the legislature to install a mechanical filtration plant of about 8,000,000 gallons, has been having studies made of the number of bacteria to be found in the water. Dr. Mason, of Troy, had investigated the water in 1902, taking five samples of water. He reported as follows: “No. 1 reservoir, 1,700 bacteria per cubic centimetre, unfit for city supply; No. 2 reservoir, 6,440 bacteria per c. c., unfit for city supply; No. 3 reservoir, 810 bacteria per c. c., unfit for city supply; Mohawk river taken near gatehouse, 720 bacteria per c. c., unfit for city supply; hydraulic canal, near pumping station, 2,920 bacteria per c. c., unfit for city supply.” In every one of these samples, Dr. Mason stated that bacilli coli communis appeared. He also stated in a letter written to the board that the water showed evidence of sewerage contamination. The water board also made an effort to procure a supply of water from Troy. Troy would give Cohoes water, if it had it to spare, provided the former city built its own pipe line to the latter’s reservoir. Even then, however, it would not guarantee to give Cohoes the water. This plan would have cost in the neighborhood of $300,000 to carry out. The water board of Cojioes is now thoroughly satisfied that nothing can he done but to filter the water, and believes that $140,000 will cover the cost.