1024 
Taste No. 9. 
The American Naturalist. 
| December, 
Chemical Analysis (parts per 100,000). 
Color Oto .30 
(Nessler Scale) to .60 
60 to 1.00 
to — 
Excess of 0 
Chlorine -01to .03 
-04 to 
25 to --- 
Hardness 10.56 
5 to 1.00 
1.00 to 2.00 
to —- 
Albuminoid 0 to .0100 
Ammonia .0100 to .0150 
(dissolved) .0150 to .0200 
0200 to —— 
Free 0 to .0010 
Ammonia -0010 to .0030 
.0030 to .0100 
-0100 to —— 
Nitrates 
; 0 to .0050 
-0050 to .0100 
-0100 to .0200 
.0200 t 
Number of Ponds and Reservoirs in which 
the Cyanophycee are 
Often 
perce c 
NRO BOOS ANOS SNNO WRENS ONN 
POR FANN NAVO FOND mwe HVA 
Occasionally|Usually be- 
above above 
1000 per c. c. |1000 
tween = “y 
500 per 
mi 
to 
— 
Nook HACK COOH ANA NVON Hew 
Below 
100 per c. c. 
ja 
en 
pa 
ey 
pd ji 
OSDO SCHOO MANTA HASA ODON mN 
Taste No. 10. 
Number of „eou and — in which 
e Infusoria ar 
Chemical Analysis (parts per 100,000). 
e Occasionally resco 
above above sins = 
1000 per c. c.|1000 per c. c. 1500 1 mare 
: Oto .30 5 2 20 
(Nessler Scale) -30to .60 1 3 6 
-60 to 1.00 2 2 8 
, 1.00 to -— 0 0 1 
Excess of 0 1 z 5 
Chlorine 01 to .03 1 3 13 
: ; -04 to .25 2 3 15 
25 to — 3 0 3 
Hardness Oto 5 0 0 T 
.5 to 1.00- 3 0 12 
1.0 to 2.0 1 6 10 
2.0 to —- 4 1 6 
0 to .01 0 0 4 
-0100 to .0150 0 0 13 
0150 to .0200 6 » 2 12 
to — 3 4 7 
0 to .0010 1 1 9 
0010 to .0030 1 2 13 
«0030 to .0100 2 5 10 
-0100 to — 4 0 3 
— Otw 0 1 12 
eam) 66s EO OY 
mun | 2 0 
Below 
100 per c. ¢. 
A 
CROW OF RN FON ONKS Ovum VMN 
+ 
| 
