176 
TABLE II. 
HYDROCHLORIC ACID ADDED. 
Time allowed 
to stand. 
Days. 
Total Acidity. 
Grms. per Litre. 
Remarks. 
5 
0-0085 
Same as in Table I. 
G 
0-0109 
No perceptible difference in the 
appearance of solution. 
7 
0-018 
No difference observable. 
8 
0 019 
Life almost immediately extinct. 
Fluid still clear. Bodies of rotifers 
seen floating in it, but of a dull 
opal-like colour, and being rapidly 
acted upon by the acid, seem- 
ingly becoming “shredded.” 
TABLE III. 
SULPHUROUS ACID ADDED. 
Time allowed 
to stand. 
Days. 
Total Acidity. 
Grms. per Litre. 
Remarks. 
5 
Life very abundant. 
G 
0-002 
Rotifers more active, causing great 
disturbance in liquid. 
7 
0-004 
Life sluggish. Rotifers not inclined 
to move. 
8 
0-01 
After 3 hours all life extinct. No 
obvious action on the bodies of 
animals. 
It is very interesting to compare these three tables. The 
order of deleterious influence on animal life being first 
