Pile No. 
U. S. S. MALLARD 
BACTERIOLOGIC SXAICENATION OF V/ATER SPECIMEN TAECEN FROM STREAM 
AT FRESH WATER BAY, CHATHAM ISLAND ON APRIL 7, 1941. 
Method used was the Dominie and Lauter test - ” a quick and 
simple method considered superior to practically all other meth- 
ods" although not an official standard test. 
Result of test of the one and only specimen taken: 
140 or more organisims (of the coli-aero-genes group 
of -^ecal origin) per 100 cc. of water, vdiich is con- 
sidered gross contamination. 
Result indicates that the stream is subject to fecal contam- 
ination (of animal or human origin) admitting the possibility of 
its being a source of water borne diseases such as typhoid fever, 
amoebic or bacillary dysentery which are transmitted from man to 
man by way of drinking water. Or, it may simply indicate relative- 
ly harmless pollution by animals such as burros, dogs, etc. 
