Report on the Bacteriology of Water. 



455 



The filament then broke quite suddenly, shooting off a short piece, 

 which I measured by itself (see below). 

 Doubling periods : 



146 -25292 '5 /i - 6.13 P.M. 6.40 P.M. = 27 minutes at 36 '537 '536 0. 

 Reckoned back : 

 ^25 450 AI = 6.30 P.M. 6.57 P.M. = 27 minutes at 36 '535 '753635 '5 C., 



and this is also the normal doubling period. 



The piece which broke off was measured as follows : 



Doubling periods : 



63126 ft = 7 P.M. 7.31 P.M. = 31 minutes at 35 -93535 '7535 '6 C. 



Reckoned back : 



158 -579 /* = 7.9 P.M. 7.40 P.M. 



31 minutes at 35 35 '75 35 C. 



On resuming the measurements at 8.30, 1 found considerable growth 

 still going on. but the filaments floated about so in the now diluted 

 gelatine, that it was not till after 10 P.M. that I succeeded in fixing 

 one, as follows. Moreover, the temperature had risen considerably 

 (to 39 C.), a fact which makes the following measurements only the 

 more interesting. 



Curve 159, p. 442. 



