252 
IOWA ACADEMY OF SCIENCES. 
BACTERIOLOGICAL RESULTS — Continued. 
DATE. 
From. 
TEMPERATURE. 
Manhole. 
Tank. 
Effluent. 
< 
u! 
0) 
£ 
Tank 
77 degrees 
81 degrees 
78 degrees 
88 degrees 
84 degrees 
85 degrees 
64 degrees 
74 degrees 
71 degrees 
74 degrees 
7 degrees 
75 degrees 
76 degrees 
71 degrees 
68 degrees 
76 degrees 
75 degrees 
76 degrees 
76 degrees 
672, 000 
1, 200 
100 
3,600 
7 o 
60 
400 
August 2 
W.E... 
August 3 *. . 
F. E 
August 4 
W.E 
August 5 
E.E 
W.E 
W.E 
August 6 
August 7 
August 7 
Manhole 
87, 870 
August 7 
Tank 
80, 800 
August 8. .... . 
E.E 
82 degrees 
83 degrees 
88 degrees 
87 degrees 
300 
400 
20 
120 
August 9 
E.E 
August 10 
W.E 
August 11 
E.E 
August 12 
♦Effluent .... 
August 13 
♦Effluent .... 
A gust 14 
♦Effluent .... 
August 15 
♦Effluent .... 
August 1 6 
* Effluent .... 
August 17 
W.E 
92 degrees 
76 degrees 
70 degrees 
68 degrees 
90 
August 7 
M anhole 
68, 000 
August 17 
Tank 
26, 000 
August 18 
♦Effluent .... 
August 19 
August 20. .... . 
♦Effluent .... 
♦Effluent 
August 21 
W.E 
80 degrees 
79 degrees 
75 degrees 
75 degrees 
320 
430 
August 22 
E.E 
Angust 22 
Manhole 
120, 000 
August 22 
Tank 
84,00^ 
August 2, 
W.E 
85 degrees 
86 degrees 
84 degrees 
80 degrees 
81 degrees 
80 degrees 
88 degrees 
83 degrees 
82 degrees 
76 degrees 
76 degrees 
75 degrees 
73 degrees 
73 degrees 
72 degrees 
72 degrees 
73 degrees 
73 degrees 
980 
380 
12 
160 
290 
3io 
680 
640 
36 o 
August 24 
E. E 
August 25 
E. E 
August 26 
E. E 
August 27 
August 28 
E.E 
W.E 
W.E 
August 29 
August 30 
E.E 
August 31 
W.E 
403, I18 
215, 700 
560 
♦Effluent under water. 
Average number of germs per cubic centimeter, in effluent.. 
MONTH. 1899. AVERAGE. 
August 2,246 
September 3,660 
October 4.230 
November 2,261 
December 2,319 
January 
February. . 
March 
April 
May 
June.... ... 
July 
August 
September 
1900. 
830 
3,451 
20, 480 
13, 263 
3,077 
2 , 359 
2,270 
It 
