THE CHEMOTROPHIC ASSIMILATION OF CARBON 53 



6-0 





GLUCOSE SERIES 



GALACTOSE SERIES 



--•-- GLYCEROL SERIES 



J 4 i" 6 7 



^/4yS O/^ GROWTH . 



5 



/O 



FIG, 



12. Growth of Scenedesmus costulatus var. chlorelloides in the 

 hght in the presence of various organic substrates. The 

 logarithms of the bulk of alga per unit volume of medium 

 plotted against time lie approximately along straight lines, 

 i.e. growth was exponential during the period of the experi- 

 ment. In each case the slope of the line is numerically equal 

 to the relative growth constant. Further explanation is given 

 on p. 107 (data from ref. 250). 



