80 PEOCEEDIXGS OF THE BALTIMORE MEETIXG 



tower and on the nature of the basement for a dam intended to serve as a 

 flood control for a water-supply reservoir. It was said that data on road- 

 building material were eagerly sought for some of the cantonments, and two 

 special examinations revealed the presence of material suitable for highway 

 construction right at the places where it was needed. Inquiries regarding 

 sources, quality, and quantity of water supplies covered all aspects of such 

 supplies, except sanitary analyses ; and reports based on at least IT special 

 field examinations were made to Army or Navy officials. 



With regards to military mapping, the author stated that the Chief of Engi- 

 neers of the Army had requested and had utilized practically all available 

 information on water supply and material for highway construction that was 

 in proper form for incorporation in the progressive military map of the United 

 States, now in preparation by the Engineer Corps of the Army. Mention was 

 made of the expression of high appreciation by the Army officers for aid in 

 procuring information of this kind. 



The author then said that as the demands made on the geologists in connec- 

 tion with the war seem to render clear the need of bearing more definitely in 

 mind the application of geology to practical things than has been customary 

 in the past, he had. with the assistance and advice of many friends among 

 geologists, engineers, and Army officers, prepared a paper entitled "Instruc- 

 tions for members of the United States Geological Survey engaged in geologic 

 mapping for military puiTDOses." which has been issued by the Director of the 

 United States Geological Survey, and that in connection with the instructions 

 certain forms for field and others for office use had been designed. A part of 

 the intent of these instructions is that such information as may be desired for 

 use on part of the military map of the United States will be collected and will 

 be so presented that it may be easily taken over and incorporated in the mili- 

 tary map. Copies of some of the forms were exhibited. Three subjects are 

 particularly emphasized in the instructions and the forms for presenting data. 

 They are as follows : ( 1 ) Water supplies, which are to be treated under the 

 captions (a) wells, (h) springs, (c) artificially impounded waters, (d) public 

 water supplies, (e) stream waters, including natural lakes and ponds, and the 

 water table. (2) Structural and road material. (3) Geologic map and table 

 of geologic formations with reference to transportation and to engineering 

 operations. 



In closing his paper, the author said that every kind of information covered 

 by these instructions has been called for by military authorities, and that he 

 beUeves such information should be available in case of unexpected emergency. 

 Furthermore, he said, that as. except for the form in which some of it is cast, 

 very nearly all, if not all. of this information is of use in peace-time economic 

 development, it is his conviction that work on areal and structural geology 

 should be prosecuted with all possible energy, and that the application of 

 geologic information to the ordinary practical things of life should be more 

 clearly recognized and given more prominence than has hitherto been the 

 custom. 



Eead by the author from manuscript. 



Discussed bv Messrs. Bailey Willis and the President. 



