Table III.
Results of the Bacteriological Examination of the Tai Lam Water Supply for the
Rate Total Colo-
nies on
MacConkey's Lactose Neutral Red Bile Salt Peptone Water.
year 1918.
Date. Filtra-tion. at 37°C. for 24 hours. Agar in 1 cc 1 cc. 2 cc. 5 cc. 10 cc. 20 cc. 50 cc. Presence of the Coli Group. 7-1-18. Unfiltered, 80 7-1-18. Filtered, 790 40 9-1-18. Unfiltered, 35 9-1-18. Filtered, 900 11-1-18. Unfiltered, 25 11-1-18. Filtered, 626 10 8-4-18. Unfiltered, 25 8-4-18. Filtered, 744 10 10-4-18. Unfiltered, 20 10-4-18. Filtered, 744 12-4-18. Unfiltered, 60 12-4-18. Filtered, 744 5 8-7-18. Unfiltered, 30 8-7-18. Filtered, 780 10 10-7-18. Unfiltered, 20 10-7-18. Filtered, 744 10 12-7-18. Unfiltered, 20 12-7-18. Filtered, 730 20 7-10-18. Unfiltered, 50 7-10-18. Filtered, 760 5 9-10-18. Unfiltered, 30 9-10-18. Filtered, 750 5 11-10-18. Unfiltered, 45 11-10-18. Filtered, 760 15 + ││+ 1 + 1+ 1 + 1 + 1 +++ | + | + ! +++ 1 +++ [ + ] [ } } + 1 + 1 + +++ |+|+|+|+|++++++ 1 +1 +1 +++++ ++++++ !+ !++ ++++++++ } +++ |+++ | + | +All samples taken either immediately before or immediately after filtration.
Group IV in 2 ccs. Group IV in 10 ccs. Groups III & IV in 1 cc. Group IV in 50 ccs.
Group IV in 5 ccs. Group IV in 20 ccs. Group I in 10 ccs. Negative up to 50 ccs.
Group IV in 5 ccs. Group IV in 50 ccs. Groups II & III in 1 cc. Group III in 2 ccs.
Group III in 2 ccs. Group III in 50 ccs. Groups II & III in 2 ccs. Group III in 5 ccs.
Group III in 1 cc. Negative up to 50 ccs. Group IV in 2 ccs. Negative up to 50 ccs.
Group IV in 1 cc. Group IV in 50 ccs.
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.
M 71