22 



MORPHOLOGIC VARIATION 



temperatures a new strain with a lower optimum was being selected 

 out. Graham-Smith has made the rather surprising observation that 



Ik 



16 



2 k 6 S 10 12 



Initial Seeding, — Cells per 1/4000 Ccm. 

 Fig. 2. Influence of Size of Seeding on Rate of Growth of Yeast. 

 Plotted from data of Adrian Brown (Jour. Chem. Soc. Lond., 1905, 87, 

 1395.) 



while growth is slower at lower temperatures, it continues longer 

 and the final level of the culture is actually considerably higher 



