EVOLUTION BY Chlorella: I 



413 



TIME IN MINUTE INTERVALS 



Fig. 1. Upper recording: oxygen concentration record near air saturation; 

 normal gain. Lower recording: rate of 0x3- gen concentration change recorded 

 simultaneously at normal gain. 



CELL 



P02 

 RECORDER 



SI 

 b 



N 



VOLTAGE 

 SELECTOR 



AUTO. 



STEP. 



S2 



-\ 



\ 



\ 



"^ 



DUMMY 



AMPLIFIER 



RECTIFIER 



FILTER 



S3 



\ 

 \ 



T 



RELAY 

 S 50 



OUTPUT _J 



1 .^ 



/ / 



/ / 



\. \ T I 7 



S5 

 b 



Oj RATE 

 RECORDER 



OUTPUT 



n 



\ 



\ 



\ 



^s \ / / 



PROGRAMING CAMS P v^ 



\ 



y 



/ 



/ 



/ 



/ 



/ 



/ 



I 1 S2 



' STEP ' 

 AMPLIFIER ON , S3 



S4 

 SSt 



RECORDERS ON 



TIME IM SECONDS ° 



Fig. 2. Block diagram of circuit and programing cam sequence 



