39(5 



Profs. Percy Frankland and Marshall Ward. 



Temp. 

 Time. C. 



7.0 P.M. = 17-0 

 8.30 = 16-5 

 8.30 A.M. = 16-5 (germination) 



11.15 = 17-25 



11.50 = 17-5 



12.20 = 18-5 



And now it was possible to begin the measurements, which ran as 

 follows : 



Beckoned back : 



139-5 69 -75 M = 6.43P.M. 9.40P.M. = 177 mins. at 17 -8 18'0 17 -25 18'0C. 

 69-75 34-75 = 4.44 ,,6.43 =119 18 '0 17 '8 C. 

 34-7517-5 ,, = 2.40 4.44 =124 18'0 C. 



The doubling periods were as follows : 



1. 9 18 n = 135 minutes at 18-518 C. 



2. 18 36 = 120 18-017-9 C. 



3. 36 72 = 125 18'0 17'75 17'9 C. 



4. 72144,, = !70(approx.)atl7-9 18 17-4 18C. 



partly calculated. 



Normal doubling period : 



1020 n - 12.50 P.M. 3.4 P.M. = 134 minutes at 18.5 18 C. 



From observation next morning, and wha"t was seen during the- 

 slowing after 7.30, there can be little doubt the inhibition was partly 



