IOWA ACADEMY OF SCIENCE 
129 
The results obtained and tabulated above show considerable pol- 
lution of Taylor Creek water near the Miller Logging Camp. After 
returning home, further cultures were made; the presence of gas 
was noted. The number of organisms had increased somewhat. 
Date 
of 
Pl’g 
Date 
of 
C’tg 
Gelatin 
Location 
Non- 
Lique- 
fying 
Lique- 
fying 
Agar 
Cedar River 
Barneston, below 
N. P. bridge .... 
8-7 
8-9 
8-9 
Cedar River 
Barneston, above 
N.P.R.R. bridge 
8-7 
8-9 
8-9 
Barneston, barrel 
on top N P. R. 
R. bridge. ...... 
8-7 
8-9 
8-9 
Above Barneston . . 
8-7 
8-9 
8-9 
Cedar River , above 
dam, lower end 
Cedar Lake 
8-7 
8-9 
30 
0 
8-9 
60 
20 
Taylor Creek, Mil- 
ler Camp No. 5, 
sewage near creek 
8-7 
8-9 
8-9 
S. W. shore of Ce- 
dar Lake 
8-7 
8-9 
30 
8-9 
40 
One mile out. . . . 
8-7 
8-9 
10 
8-9 
20 
Cedar River below 
power house. . . . 
i 
8-7 
8-9 
8-9 
10,000 
10,000 
0 
10,000 
10,000 
One mile from dam, 
S. W. shore. .'. . . 
8-7 
8 9 
8-9 
Mouth of Rex Riv- 
er, 200 feet from 
shore 
8-7 
8-9 
60,000 
48,000 
8-9 
Upper end of Cedar 
Lake near Cedar 
River 
8-7 
8-9 
8-9 
Cedar River, half 
way between 
power house and 
Barneston 
8-7 
8-9 
8-9 
| 
Litmus 
Lactose 
Agar 
Acid 
Gas 
55,000 
32H+ 
30,000 
42C0 2 
8,000 
0 
0 
40,000 
0 
0 
48,000 
32H+ 
36,000 
42CO 
8,000 
0 
40,000 
0 
40 
20H+ 
30 
19C0 2 
180,000 
0 
68H+ 
62C0 2 
0 
0 
0 
0 
20,000 
30H+ 
10,000 

14C0 2 + 
12,000 
20H+ 
9,000 
8C0 2 + 
0 
0 
0 
0 
168,000 
48H+ 
48,000 
18,000 
0 
0 
8,000 
0 
9 
