THE EFFECT OF CYANIDES OX PROTOPLASM. 



317 



FIG. i. Volume of eggs after definite exposures to various concentrations of 

 HCN plotted against the time in 50 per cent, sea-water, showing the rate of in- 

 crease in volume. Control A was exposed to 100 per cent, sea-water instead of 

 HCN while control B was exposed to 67 per cent, sea-water, comparable to the 

 hypotonicity of the A^oo HCN. Controls in other percentages of sea-water com- 

 parable to the remaining concentrations of HCN have been omitted to avoid con- 

 fusion, but in all cases, the volumes of the eggs in sea-water were less than the 

 volumes in the HCN solutions. 



2 3 * .f 7 6 9 to 



HYFOTOn/C SEA-WATCH 



FIG. 2. Illustrating the rate of increase in volume of eggs exposed to the same 

 concentrations of HCN but for varying time intervals. The control was exposed to 

 100 per cent, sea-water. 



