358 Veranus Alva Moore 



(2). A culture Bacillus coli comrminis obtained from the 

 pectoral muscle of a pig which died in an outbreak of swine 

 disease in 1892. The motility of the bacteria in this culture 

 was less marked than in those from the previous culture. 

 The flagella extended out from the body of the bacteria in 

 delicate, more or less wavy filaments. In diameter, course, 

 and general appearance they differed in no perceptible manner 

 from the flagella on the previously described germ. The 

 maximum number of filaments that was found on an indi- 

 vidual was one less than in the previous case, and the num- 

 ber which possessed but one flagellum was proportionally 

 larger. The number of detached filaments was not in excess 

 of those in the preparations of the colon bacteria from the 

 human intestine. In order to arrive at a more accurate com- 

 parison, the flagella on 200 individual bacteria from selected 

 fields were counted. Of these, 11 showed no flagella, 83 had 

 one, 55 had two, 29 had three, 13 had four, 6 had five, and 3 

 had six. The maximum length of the filaments measured 

 was 15 /A. The length of the greatest number varied from 5 

 to 9 /A. 



Flagella on Bacillus typhi abdomhialis. — (Plate I, Fig. 3). 

 For my cultures of typhoid bacilli I am indebted to Dr. Theo- 

 bald Smith. These cultures were from two to four years 

 old. Unfortunately I have no knowledge of the history 

 of these cultures prior to their arrival in our laboratory, 

 (i) A culture obtained from the Johns Hopkins Hospital, 

 Baltimore, Md. When examined in a fresh condition (hang- 

 ing drop) the majority of the bacilli were observed to be in 

 active motion. 



The arrangement of their flagella was not perceptibly dif- 

 ferent from those on the hog cholera and colon bacteria. In 

 the examination of different preparations of this bacillus a 

 considerable variation was found to exist in the appearance of 

 its flagella. A certain number of the bacilli were provided 

 with long, nearly straight or wavy filaments which extended 

 in various directions from the body of the germs, while the 

 motile appendages on the greater number of the organisms 

 were shorter, more curved, and intertwining, presenting a 



