196 



W. A. Matheny 



that something must be done to revive them. On January 19 the 

 paramecia were transferred to an infusion made of alfalfa. They 

 at once showed a marked increase in the rate of division. The 

 division rate has since been uniformly high and devoid of depres- 

 sion periods, except one or two of very brief duration, due to fall 

 of temperature in the laboratory. 



TABLE 



Table showing compa'ison of Hay Infusion and Alfalfa Infusion as Culture Media. The Alco- 

 hol was mixed directly with the media as indicated below. In column I are given the average gen- 

 erations of paramecia in hay infusion for thirteen days. Column 2 shows the ave-age generations 

 of the paramecia in alfalfa infusion during the succeeding thirteen days. 



