i54 THOMPSON YATES LABORATORIES REPORT 
On gelatine plates there was no difference to be made out between the colonies 
of the various bacilli. They were all irregular-shaped, filmy, and translucent. Some 
were more heaped up and opaque in the centre, but that was all. 
It is noteworthy that all the bacilli appear to belong to the B. coli communis 
group. 
The glucose broth and lactose broth used were two per cent, solutions of 
peptone in water, to which 0*5 per cent, glucose and 1 per cent, lactose had been 
added respectively. Into each tube was put one of Durham's fermentation tubes. 
As an ordinary nutrient agar plate made from the same earth was over- 
crowded, the inhibiting effect of the taurocholate medium is most marked. 
It may, therefore, be recommended to bacteriologists as an addition to the 
means at their disposal for the isolation of the B. typhosus. 
