256 



CHARLES E. BILLS. 



Three sets of observations were made. The results are re- 

 corded in Tables L, II., and III. Table I. is a record of the ac- 



TAELE I. 



A RECORD OF THE ACTIVITY, SIZE, AND POPULATION OF CULTURES FROM CLONE 



10, UNDER THE INFLUENCE OF 1.0 PER CENT. METHYL, O.8 PER CENT. 



ETHYL, 0.4 PER CENT. PROPYL, AND 0.2 PER CENT. BUTYL 



ALCOHOLS.. 



tivity, size, and endurance of organisms from Parameciwn cau- 

 datinn, Clone 10 exposed for varying lengths of time to the first 

 four normal primary alcohols in the following concentrations: i.o 

 per cent, methyl ; 0.8 per cent, ethyl ; 0.4 per cent, propyl ; 0.2 per 

 cent, butyl. Table II. is a similar record of five discrete experi- 

 ments on Clone 10 showing the difference between alchoholized and 

 normal cultures. Controls consisting of culture diluted with an 

 equal volume of spring water were used in this series. All the 

 treated cultures contained i.o per cent, methyl alcohol. Table 

 III. is a comprehensive record of seven cultures of paramecia, 



