Parameciidae 



125 



27 



32 



37 



42 



PLATE DS~5b 



47 52 57 62 



67 



72 



77 



760 



700 

 660 



400 



250 

 200 

 150 

 100- 



50- 

 35 



400 



200 



VOLUME OF CULT URL 

 IN CCS 



s 



,H 



n>OD ADDED 'E 9 f IN CC$ ? 



TTTTT 



POPULATION PER C.C 



AVERAGE LENGTH ° 

 IN MICRA » 



o u o 



> o" °o° °° 



AVERAGE WIDTH 

 IN MICRA 



TURBIDITY TEN MINUTE5 

 AFTER STIRRING 



r^VV2i 



^^v 



TURBIDTTY BEFORE STIRRING^ 



Tcoj 

 CLEAR JK, CLEAR, 



AVERAGE VOLUME OF ONE 

 ANIMAL IN (itifyV- 



^ 'VOLUME OF RR$T0PLA5M 



27 32 37 42 47 52 57 62 



A6E IN MY5 



67 72 



400 



200 



a 



TURBIDITY 

 5 



I? 



1$ 



20 



77 



Fig. 44. — Record of the decline of a Paramecium population as well as its later rehabilita- 

 tion after feeding egg. The abscissa represents time in days, beginning with the 27th 

 day. The Paramecium population was near its maximum. The ordinate presents the 

 following data: volume of infusion; pH; dates when egg was added, with the approximate 

 amounts; concentration of Paramecia/cc; average lengths and widths of 10 living animals, 

 with maxima and minima indicated; turbidity of the culture before stirring (To), and 

 10 minutes after stirring (Tio) ; the average volume of single animals in thousands of 

 cubic micra, and the average volume of Paramecium protoplasm maintained per cc. of 

 infusion in millions of cubic micra. 



