14 



ILUNOIS BIOLOGICAL MONOGRAPHS 



[134 



concentration. The curve HIJK is an equilateral hyperbola drawn from 

 calculations and has been designated as the theoretical survival time curve. 

 The two curves HIJK and LIJM show the variation of the actual survival 



Ammontom Chloride. 



TABLE V 

 Temperattieue 21° C. November 24 to 25, 1916 



Ammonium Chloride. 



TABLE VI 

 Temperature 21.5° C. 



April 12, 1917 



