66 THOMPSON YATES LABORATORIES REPORT 
Western 
Outfall, 
High Level 
Date 
Dilution 
No. 
of 
Average No. 
of 
Bacteria per c.c. 
November jth, i8q8,.. 
\ 10,000 

6 
3,l6o,000 
1 100,000 
6 
5,760,000 
„ nth, „ 
f 10,000 
6 
32,4.80,000 
li^o-o 
5 
3 5,960,000 
„ I5th, „ 
100,000 
O 
64., 6oo,000 
„ 2 1st, „ 
100,000 
6 
4,2 I 7,000 
June 27th, 1899 ... 
100,000 
3,140,000 
July 10th, „ 
100,000 
6,540,000 
„ 13th, 
100,000 
22,834,000 
,. 28th, 
100,000 
6,000,000 
August 23rd, 
100,000 
3,700,000 
September 2nd, „ 
100,000 
1,340,000 
WALTON SEWAGE FARM 
Crude Sewage 
Date 
Dilution 
No. 
of 
Plates 
Average No. 
of 
Bacteria per c.c. 
November nth, 1898 
\ 10,000 
6 
9,554,000 
1 1 00,000 
6 
32,200,000 
100,000 
6 
20,800,000 
„ 2 1 st, „ 
100,000 
6 
4, 1 70,000 
28th, „ 
100,000 
4 
425,000 
From the above tables it will be seen that the average number of bacteria per 
ex. varies very greatly. The average of 29 analyses is 1,090,726. 
