176 



TABLE II. 



HYDROCHLORIC ACID ADDED. 



Time allowed 



to stand. 



Days. 



Total Acidity. 

 Grms. per Litre. 



Remarks. 



0-0085 

 0-0109 



0-018 

 0019 



Same as in Table I. 



No perceptible difference in the 

 appearance of solution. 



No difference observable. 



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. 



It is very interesting to compare these three tables. The 

 order of deleterious influence on animal life being first 



