> THE TYPHOID GROUP— 
Study : 
A. Bacillus typhosus Migula, 1900. 
B. Bacillus dysenteriiB Shiga, 1898 [uot Migula, 1900]. 
C. Bacillus enteriiidis Gaertner, 1888. 
D. Para-colou bacillus. 
E. Para-typhoid bacillus. 
F. Bacillus mu7-ium ifiligula, 1900. iBacillus typi inutnum L'6(Aer, 18dS.'\ 
G. Bacillus of Dauyz’s virus. 
H. Bacillus psitticosis. 
I. Bacillus icteroides Sanarelli, 1897. 
J. Bacillus coli Migula, 1900. [Bacterium coli commune Escherich.] 
K. Methods of iutroduction into the system. 
L. Channels of elimination. 
M. Viability. 
N. Disinfection. 
O. Relation to the water supply. 
P. Relation to flies and other insects. 
Q. Widal reaction. — 
a. With hanging drop. 
h. In pipettes. 
