JONES' SOFT ROT OF CARROT, ETC. : CAUSE 239 



of six soft-rot organisms is shown in +15 peptone beef bouillon 

 containing ten per cent of Squibb 's absolute ethyl alcohol viz. 

 3a recently from Jones (year 1919), 3a long in my laboratory 

 (the branched 3a of Fig. 177), Potter's organism (No. 79 of 

 Jones' laboratory), Spieckermann's organism (No. 78 of Jones' 

 laboratory), Bacillus phijtophthorus (Appel I) and Bacillus 

 apiovorus Wormald. 



Fig. 180. Fig. 181. 



Fig. 180. — Surface colony of Bacillus carotovorus on + 10 beef-peptone gelatin 

 after 24 hours at 18°C., showing marginal fringe. X 110, about. Actual dia- 

 meter of colony, 0.4 mm. 



Fig. 181. — Margin of a surface colony of Bacillus carotovorus after 3 days on 

 gelatin, showing bacterial fringe pushing out into the gelatin. The darker band 

 behind the fringe was liquefied and full of bacteria which exhibited, as a whole, 

 a weaving or swaying motion. Medium magnification. 



Note. — Not having myself worked-over all of these soft-rot 

 organisms critically, i.e., through a series of years, the following 

 conclusions on the synonomy are expressed tentatively. 



Forms apparently identical with Bacillus carotovorus are 

 Bacillus oleraceae Harrison on cauliflower and Bacillus omnivorus 

 van Hall on iris. Under the name of Bacillus apiovorus 



