BILE SALT BROTH 165 
With regard to the remaining four, we consider : — 
1. That as milk is so exposed to contamination, and the B. acidi lactici 
(Hueppe) bears such a close relationship to B. coli, it should be placed in the same 
group. 
2. That the B. pneumoniae (Friedlander) will not invalidate the test, 
because it is a noxious organism, and in the present state of our knowledge can not 
be said to be non-intestinal. 
3. That the B. cloacae (Jordan), having apparently been isolated only from 
waters certainly contaminated, may be looked upon as evidence of pollution. 
4. That the M. candicans (Flugge) may be neglected, on account of the 
rarity of its appearance in our work. 
It is possible that future research may reveal sources of error or confusion, 
but up to the present this test has in our hands proved itself simple and reliable. 
