HARRISON] ANALYSES OF OTTAWA RIVER WATER 27 
December and January; whilst B. coli of sewage origin was highest in 
September, followed by October, August, December, January and 
February. 
The deaths from typhoid fever in Montreal during these months 
was as follows :— 
August, ES ANA SG eR AE 14 deaths. 
TSU] reve] G72) oT tat PER A RES RS 1 à LS ee 
October, TAR A TE oO ah UR TANT odie: 
No ME in Den VERS TR Se anes CL Ls ties 
DEÉCEMDET ye iy Me SUR RE LA LAN ih ss FH AVAL 
The Montreal death rate from typhoid fever per 100,000 for the 
year 1909,was 53-6, and for 1910, 42. 
In the accompanying tables the number of bacteria per c.c. growing 
in gelatin at 20° and on agar at 37° is given. 
In addition to the information with regard to the number of colon 
bacteria, tests were also made from 20 c.c of water, as to the presence 
or absence of B. enteritidis. The occurrence of soil organisms is given — 
in the column under B. mycoides, which also includes B. subtilis and other 
spore-bearing organisms. The presence of various species of Proteus, 
and of B. fluorescens liquefaciens is also given. Chromogenic bacteria were 
occasionally numerous, particularly those giving yellow pigment; at 
times B. violaceus and B. prodigiosus were found. Cladothrix was 
frequently present, particularly when the water was contaminated with 
surface washings. 
| B. coli of B. coli from 
Month. B. coli sewage origin | other sources 
per 5 c.c. per 5 c.c. per 5 c.c. 
9 
SEH Ee AP LOO Ds wr ert daz RM N 11- — = 3 8 
3 
9 | 
May, WE kad SNS Re 9: =a IL 74 
6} 
9 
June, “ily (REP ER EN TA AE 5: — = 2 3 
5 
9 
July, sol yh 4 ie et a ea Se 7- — — 4 3 
23 
9 
August, MR aes rest AS devine 40- — = 6 34 
13 
9 
Pépin Ner na surely ae À 46- — — 9 37 
1 
