CX)NTROL OF FIELD- WATER SUPPLIES 
255 
carriers in interstate traffic. This standard requires that the 
number of bacteria growing at 37° C. on agar shall be less than 
100 per c.c. of water and that not more than one out of five 10 
c.c. portions shall show the colon bacillus when tested for gas 
formation in lactose broth and confirmed by litmus lactose or Endo 
agar plates. Eosin methylene blue lactose agar plates also were 
used in the confirmatory tests. A bulletin on Water Analysis 
giving the methods was published for the A. E. E. by the Bureau 
of Medical Publications of the American Red Cross Society. 
Bacteriological water work was not the only laboratory work 
undertaken. At least one of the laboratories undertook work on 
boiler waters for locomotives and cranes, another did work on 
laundry waters, another on cooling water for airplane motors 
and so on. Operation of filter plants and chlorinators, super- 
vision of Lyster bag chlorination, sanitary surveys and other 
investigations fell to the lot of practically all officers of the 
service. 
The writer’s first A. E. E. assignment was to the Water Analysis 
Laboratory, Paris. This assignment, however, was merely tem- 
porary and orders came to proceed to the headquarters of Base 
Section 3, at London, where further orders were received desig- 
nating him as Water Supply Officer with station at Winchester 
and laboratory in the Base Laboratory located there. The Water 
Laboratory was in a small room adjacent to the Base Laboratory 
which had at one time been occupied as a tea room. The equip- 
ment was adequate and work was undertaken promptly. All of 
the inspections, collections, analytical work and typing was done 
by the writer. The typing was quite a big part of the work as 
nine copies of every report had to be made in order to have 
enough for the various officers to whom reports were to be sent. 
A specially qualified sergeant and private were about to leave 
Paris for England to assist in the work when the armistice was 
signed and they were retained in France. At the time of the 
armistice there were nearly one hundred hospitals and camps in 
Base Section 3 in which American detachments were stationed. 
Many of these were Air Service troops who were rapidly as- 
sembled in larger camps. On the termination of hostilities the 
writer’s instructions had been to finish first the work in the 
Southern district and then proceed to the work in the north in 
Scotland and Ireland. The armistice found the work in the 
southern district unfinished, so that aside from a thorough survey 
of the water supply of Liverpool, the work done was confined 
