82 



The eiiilimnioii contained 74.6 per cent, of the phmkton. the thermocliue 

 21. S per cent, and the hypolimnion 3.5 per cent. 



Plankton was more abundant in August than in July. 



So far as these observations go, wind has no appreciable effect upon the 

 distribution of the plankton. 



EXPLANATION OF FIGURES. 



Figures 1 to 15, inclusive, indicate the distribution of the organisms. 

 The numl)ers at the bottom indicate the date. 



Figure 16 shows graphically the amount of dissolved gases at different 

 depths. 



Figure 17 indicates tlie maximum, minimum, and average temperatures. 



