Table IV.
Results of the Bacteriological Examination of the Fokfulum Water Supply for the year 1916.
Rate of Filtration Date of Sample Total Colonies on Agar in 1 cc. at 37° C, for 24 hours. MacConkey's Lactose Neutral Red Bile Salt Peptone Water. Presence of the Coli Group. Unfiltered, Filtered, 3-1-16. 35 Unfiltered, Filtered, 3-1-16. 5-1-16. 450 5 60 Unfiltered, Filtered, 5-1-16. 450 5 Unfiltered, Filtered, 7-1-16. 70 500 40 Unfiltered, Filtered, 3-4-16. 125 450 29 Unfiltered, Filtered, 5-4-16. 45 ... 10 Unfiltered, Filtered, 7-4-16. 20 400 5 Unfiltered, Filtered, 3-7-16. 40 ... 5 Unfiltered, Filtered, 5-7-16. 5--16. 15 800 2 Unfiltered, Filtered, 7-7-16. 50 800 20 Unfiltered, Filtered, 2-10-16. 70 800 5 Unfiltered, Filtered, 4-10-16. 60 800 Unfiltered, Filtered, 6-10-16. 6-10-16. 80 700 15 1 cc. 2 cc. 5 cc. 10 cc. | 20 cc. | 50 cc. | + | + | + | + 1 + 1 + + 1 + 1 + 1 + | + | + + | + + + + 1 + + 1 + 1 + +++++ | + | + | + + + + + + + + 1 +++ 1 + + 1 + 1 + ++++++ i + 1 + ++++ ++Group IV in 5 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.
Group IV in 2 cc. Negative in 50 cc.
Groups I and III in 1 cc. Negative in 50 cc.
Groups I and IV in Group III in 5 cc. Groups I and IV in cc.
Group I in cc. to
+1+++
Group III in 2 cc.
Group IV in 5 cc.
Group I in 2 cc.
Groups I and III in 20 cc.
Group I in cc.
Group II in 50 cc.
Groups I and IV in 5 cc.
Negative up to 50 cc.
Group III in a cc.
Groups III and IV in 20 cc.
Groups I and II in 1 cc.
Group III in 2 cc,
Group IV in 1 cc.
Group II in 10 cc.
Group II in 1 cc.
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