Summary.1A disease of swedes is shown to be related to the presence of bacteria.2Certain features of the disease lead the authors to reserve their opinion as to whether bacteria are wholly responsible until opportunity for further investigation shall have presented itself.3An organism has been isolated and described.4The organism has been shown to be identical with one isolated contemporarily from cauliflower in France by Dufrenoy and Szymanek.5The identity of the organism withPseudomonas campestrishas been discussed and it has been suggested that it is probably a saltant strain of this species, though the authors reserve the question of actual identity until farther evidence is available.6The strain possesses more than one flagellum.