DF 
hood) was gaining access to an underground filtered water 
reservolr. 
The following conclusions are quoted from Dr. Houston’s 
work :— 
‘ (1) That streptococci are superabundant in human 
feeces. 
(2) That fecal streptococci are absent or non-dis- 
coverable in a relatively large volume of pure 
water. 
(3) That fecal streptococci do not multiply in pure 
water. 
(4) That some fecal streptococci are of feeble vitality, 
and the presence of such streptococci in a water, 
if they could be differentiated from their more 
robust companions, would seem to indicate pol- 
lution of recent and therefore specially danger- 
ous sort.”’ 
These also describe our experience in this country, only 
the results of our work show that we should be justified in 
stating the case somewhat more forcibly. 
