28 
Month. 
October, 
November, 
December, 
January, LOLOn as. 
February, 
Mo 
April, 
May, 
June, 
July, 
August, 
September, 
October, 
November, 
December, 
January, 1911 
February, 
March, 
April, 
1909 
“ 
“ 
“ 
“ 
“ 
“ 
« 
“ 
THE ROYAL SOCIETY OF CANADA 
call ST AM eae le) 668) es Sal = 
I 
20: 
B. coli of 
sewage origin 
per 5 c.c. 
9 
—— — 9 
1 
9 
—_= 6 
1} 
9 
— — 6 
1} 
9 
RAPES BT 
15 
9 
— = 6 
1} 
9 
Er Ag 
2 
12 
— — 4 
3 
12 
— = 2 
by 
1 
— — Oo) 
5 
12 
— == 5 
23 
12 
— — 8 
14 
12 
— = 12 
1 
12 
— = 12 
1 
12 
—= 8 
14 
12 
SS 8 
13 
12 
Lis $ 
13 
12 
8 
13 
12 
— — 6 
2 
12 
— = 4 
B. coli from 
other sources 
per 5 c.c. 
13 - 
13}. 
“J 
25 - 
44 - 
49 - 
16 - 
