Table IV.
Sample.
Date.
Rate of filtration.
Total Colonies on Agar.
Results of the Bacteriological Examination of the Tytam Water Supplies for the year 1922.
Mac Conkey's Lactose Neutral Red Bile Salt Peptone Water.
Presence of the Coli group. in lec at 37° C. 2 c.c. 5 c.c. 10 c.c. 20 c.c. 50 c.c. Unfiltered, 9-1-22. 186 Filtered, 9-1-22. ... ! Unfiltered, 6-2-22. Filtered, 6-2-22. 80 40 6 Unfiltered, 13-3-22. ... Filtered, 13-3-22. ... Unfiltered, 3-4-22. Filtered, 3-4-22. ... 10 10 83 8 Unfiltered, 1-5-22. 30 ... Filtered, 1-5-22. 7 Unfiltered, 6-6-22. 85 ... Filtered, 6-6-22. Unfiltered, 3-7-22. II 70 Filtered, 3-7-22. 5 Unfiltered, 8-8-22. 80 Filtered, 8-8-22. 10 Unfiltered, 4-9-22. 77 ... Filtered, 4-9-22. ... ! Unfiltered, 2-10-22. 18 100 Filtered, 2-10-22. 15 Unfiltered, 1-11-22. 266 Filtered, 1-11-22. 23 Unfiltered, 4-12-22. Filtered, 4-12-22. 86 15 +++ | + | | |│+ | + | ││+│+│+1 +1 +1 +1 + +1 +1 +1 +1 +++ 1 + 1 + ! + 1 + + + ! + 1 + + + 1 + 1 + 1 + + + + !++ -+ +1+++ !+++++ 1+++++++ | ÷ 1++ +1+++++ | ++++ +++++ Absent in 50 c.c. Group 1 in 1 c.c. Group IV. Group II. Group 1. in I c.e. Negative up to 30 c.c. Group I. Group II. Group I. Group I in 1 c.c. Negative up to 50 c.e. Group I in I c.c. Negative up to 50 c.c. 1 Group IV. Groups I & IV, in i c.c. Group II. in 50 e.c. Group 1. Group IV in 1 e.c. Negative up to 50 c.c. Group III in 5 c.c. Negative up to 50 c.c. Group IV. Group IV.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. 1 = Acid only, = No Change.
M (1) 46