12 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[132 



trations from 0.133 to 0.089 N. there was again a less rapid increase in survival 

 time in proportion to the decrease in concentration of the lithium chloride 

 solutions. These points can be better illustrated by the graphic method, 

 (Fig. 1). Let one block abscissa represent 0.05 N. LiCl and one block ordinate 

 represent 120 minute survival time of the goldfish and plot data as represented 

 in Table I. When the points ( + ) have been located on the graphs the curve 

 LIJ]SI can be drawn by interpolation. The crosses of this and all subsequent 

 graphs are located from actual experimental data. The curve LIJM thus 



Sodium Chloride. 



TABLE II 

 Temperature 21.5° C. 



November 19 to 20, 1916 



Sodium Chloride. 



TABLE III 

 Temperature 21.5° C. 



April 10, 1917 



