416 Profs. Percy Fraiikland and Marshall Ward. 



Germination had set in normally, and rodlets tip to 50 /* were 

 found. I selected one 37 ft long, divided into two segments of 18 /* 

 and 19 /* respectively, and measured as follows, taking each of its 

 two segments separately ; they were joined at an angle of about 

 165 : 



Segment A. 

 Doubling periods : 



1. 1938 ft = 2.28 P.M. 3.24 P.M. = 56 minutes at 21 '121 21 '5 0. 



2. 3876 = 3.24 4.35 = 71 21 '52222 -2521 -8 C. 



Or, calculated back : 



103 -5 51 -25 M = 3.53 P.M. 5.0 P.M. = 67 mins. at 2222 -2521 -822 '7 C. 

 51 -2525 -5 = 2.55 3.53 = 58 21 -222 C. 



Normal doubling period : 



27 54 /t = 60 minutes at 21-522-1 C. 



Segment B. 

 Doubling periods : 



1. 1836 n = 2.28 P.M. 3.26 P.M. = 58 minutes at 21 '12121 '5 C. 



2. 3672 = 3.26 4.30 = 64 21 -522-22 -25 C. 



Normal doubling period : 



2754 JJL = 3 P.M. 4 P.M. = 60 minutes at 21 -2522 '1 C. 



Total. 

 Doubling periods : 



1. 37 74 p = 2.28 P.M. 3.24 P.M. = 56 minutes at 21 '12121 '5 C. 



2. 74148 = 3.24 4.33 = 69 21 '522 -2522 C. 



Or, calculating back : 



207-0103 -5 M = 3.55 P.M. 5.0 P.M. = 65 minutes at 2222 '2521 -7 C. 

 103 '5 51 -25 = 2.55 3.55 = 60 21 '122 C. 



On July 30 spores were sown in broth + 1 per cent, gelatine, and 

 put in at 8 A.M. Germination was very rapid at 2375 (8 A.M.), 23'5 

 (9.20), 24 (10 A.M.), and at 10.45 a rod 9 ft, long was selected. 



Doubling periods : 



1. 918 p. = 10.45 A.M. 11.30 A.M. = 45 minutes' at 24 '5 C. 



2. 18 36 = 11.30 12.12 P.M. = 42 24 '5 C. 



3. 3672 = 12.12 P.M. 12.56 = 44 24 '524 '8 C. 



Or, calculated back : 



76 -538 -25 n = 12.17 P.M. 1.0 P.M. = 43 minutes at 24-524 '8 C. 

 38-5 19-0 = 11.33 A.M. 12.17 = 44 25'0C. 

 19-0 9-5 = 10.47 11.33A.M. = 44 25 -0 C. 



