58 Proceedings of Indiana Academy of Science. 
“There are two hundred and sixteen members of the Survey in mili- 
tary service, one hundred and fifty of whom came from the topograph- 
er’s branch. One of the Survey geologists in the Engineer Officers’ 
Reserve Corps fills an important scientific post on General Pershing’s 
staff that requires a knowledge of geology. One of the Survey topo- 
graphic engineers was also assigned to General Pershing’s staff, where 
he occupies a position that requires special knowledge of topographic 
engineering. 
“As soon as war was declared every member of the Survey who 
could be spared took up war emergency work. They became members 
of various national committees necessary for the successful conduct of 
the war. The geologic branch was called upon to supply information 
concerning the mineral resources of the United States and of foreign 
countries. A systematic search of the United States has been made for 
the minerals which we have depended upon foreign countries to supply, 
and we congratulate ourselves upon the results of this search. Ores of 
manganese, chromium, tungsten, quicksilver and sulphur have been most 
sought. The results of the search for potash rewarded the Survey 
beyond expectations. There has been an attempt to bring consumers 
and producers of supplies closer together. 
“Surveys containing topographic, geographic and geologic informa- 
tion have been made of the several cantonment districts. Different 
kinds of coal have been carefully investigated at the request of the 
Secretary of the Navy, and also for the War Minerals Committee. Over 
forty skilled topographie engineers have been sent to Europe. Camera 
mapping is being carefully studied. 
“The water resources of the Survey, in addition to performing its 
routine work, has been called on to furnish much special information 
that is immediately pertinent to the work of the War and Navy De- 
partments. In co-operation with the geologic branch, it furnished data 
concerning the camp water supplies of all the border States except 
those contiguous to Canada; made tests of the water and estimates of 
the quantity available at the sites of war industries plants to be erected 
in the eastern part of the country; reported to the Surgeon General’s 
office on the quality of the water at thirty-three cantonments in twenty- 
three States; determined the quantity and quality of the ground water 
available at seven aviation camps; made a field survey of the water 
conditions along the Mexican border west of Nogales, Ariz.; made com- 
parison of the quality of the water of European and American springs; 
made recommendations to solve the problem of contamination of the 
water supplies of the Kansas River by sewage below Camp Funston; 
and reported on available waterpower and quality of boiler water at 
Yorktown, Va. 
