CONDITIONS FOR CONJUGATION 



383 



TABLE 6 



PARAMECIUM 



STRAIN 



P. aurel., llj 



P. aurel., Hi 



DORMANT 



CULTURE 



July 24, 

 1919 



July 24, 

 1919 



DATE renewed; cultube medium 



A. September 19 (aque- 

 ous) 



B. September 19 NaNOa 

 (0.002N) 



A. September 25 (aque- 

 ous) 



B. September 25, NaNOa 

 (O.OOIN) 



C. September 25, NaNOj 

 (0.002N) 



D. September 25, NaNOa 

 (0.003N) 



CONJUGATION IN THE 

 RENEWED CULTURE 



None 



September 26, casual 



None 



None 



September 30, one pair 



September 30, 3 to 5 

 pairs 



TABLE 7 



PARAMECIUM STRAIN 



P. aurel., Ibl 

 (stock cul- 

 ture) 



DORMANT 



CULTURE 



P. aurel., 3d 



July 24, 

 1919 



DATE RENEWED; CULTUBE MEDIUM 



July 24, ^ 

 1919 



A. September 30 (aque- 

 ous) 



B. September 30, NaNOs 

 (0.0025N) 



C. September 30, NaNOs 

 (0.005N) 



D. September 30, 'Na + 

 Ca' (0.005N) 



A. October 4 (aqueous) 



B. October 4, NaNOs 

 (O.OOIN) 



C. October 4, NaNOs 

 (0.002N) 



CONJUGATION IN THE 

 RENEWED CULTURE 



October 2, 5-10% 



October 2, casual 

 October 3, 5% 



October 2, casual 

 October 3, 1-3% 



October 2, casual 

 October 3, casual 



None 



October 8, 1-3% 

 October 10, 1-5% 

 October 12, 10-15% 



October 8, 5-10% 

 October 13, 1-3% 



