Table II.
Results of the Bacteriological Examination of the Kowloon Water Supply for the year 1915.
Rate of Filtration Date Sample Total Colonies on Agar in 1cc MacConkey's Lactose Neutral Red Bile Salt Peptone Water Presence of the Coli Group M 79 Unfiltered, Filtered, -- 5-1-15. Unfiltered, Filtered, 60 144 7-1-15. Unfiltered, Filtered, 50 438 15 9-1-15. Unfiltered, Filtered, 20 416 5 13-4-15. Unfiltered, Filtered, 25 411 7 15-4-15. Unfiltered, Filtered, 20 500 ... ... 17-4-15. Unfiltered, Filtered, 30 475 10 10 6-7-15. Unfiltered, Filtered, 35 544 5 5 8-7-15. Unfiltered, Filtered, 30 530 5 5 10-7-15. Unfiltered, Filtered, 30 522 4 4 5-10-15. Unfiltered, Filtered, 15 575 3 3 7-10-15. Unfiltered, Filtered, 25 581 10 10 9-10-15. Unfiltered, Filtered, 20 583 5 1 cc. 2 cc. 5 cc. 10 cc. 20 cc. 50 cc. + + + + + + + + + + + + + + + + + + + + Negative up to 5 cc. in 50 cc. + + + + + + + + + + + + + + + + + + + + Group I in 5 cc. Negative up to 50 cc. + + + + + + + + + + + + + + + + + + + + Group IV in 10 cc. Negative up to 50 cc. + + + + + + + + + + + + + + + + + + + + Groups I and IV in 10 cc. Negative up to 50 cc. + + + + + + + + + + + + + + + + + + + + Groups III and IV in 1 cc. II in 50 cc. I and IV in 1 cc. IV in 50 cc. I in 10 cc. Negative up to 50 cc. Group IV in 10 cc. Negative up to 30 cc. Group III in 2 cc. Negative up to 50 cc. Group I in 10 cc. Negative up to 50 cc.All samples taken either immediately before or immediately after filtration. The rate of filtration is given by the Water Authority in gallons per square yard per day. Classification of the Coli Group is that of MacConkey, + Acid and Gas ; Acid only; No change.