154 PROCEEDINGS OF THE BOSTON MEETING 



3. Water supply. — ^Resources of surface and underground water. 



4. Transportation. — Road metal, railroad ballast, stability of talus slopes; 

 depth of soil and weathered material ; river crossings, etcetera. 



5. Construction. — Raw materials for concrete, building stones, etcetera ; 

 stability of slopes ; depth to bedrock, etcetera. 



Presented without manuscript. 



Discussed by Messrs. Lawrence Martin, Frank D. Adams, and H. F. 

 Cleland. 



Discussion 



Prof. Lawrence Mabtin pointed out that the continuation of interest in 

 geology on the part of the American army administration may be maintained 

 by pointing out {a) the excellent work of Colonel Brooks and his assistants in 

 France ; {h) the mistakes made during the war by all the Allies, through 

 failure to use geologists adequately from the beginning, and (c) the extent to 

 which the enemy found geologists indispensable. 



Following the period when the Germans located water at Saint Mihiel with 

 a witchhazel twig, they increased their geological service until in and follow- 

 ing January, 1918, each of their 13 armies on the western front is believed to 

 have maintained 22 geological workers. Each Armee Oberkommando had a 

 Geologen Gruppe, with a geologist (commissioned officer) as chief. Each of 

 the three general Kommandos, or army corps, had Geologenstelle with one 

 geologist (officer or beamter) as chief and three geologengehilfen. Each of 

 the three divisions in a corps had one geologengehilfe. Thus a German army 

 had four geologists and 18 assistants. Some of the assistants were geological 

 students from the German universities ; some were teachers or technical 

 men ; toward the end they were trained in special six-week courses in military 

 geology. 



SURVEY OF ROAD MATERIALS IN NEW HAMPSHIRE 

 BY JAMES WALTER GOLDTHWAIT 



(Abstract) 



Few States make use of such diverse materials in road construction as New 

 Hampshire, because of (a) the widely differing physical conditions in different 

 parts of the State — particularly climate, grades of roads, and ground water ; 

 (&) extreme differences in traffic, both as regards the amount and the kind ; 

 and (c) the great variety of materials locally available, owing to the diversity 

 of bedrock geology and to glaciation. 



While economy and efficiency demand, on the one hand, an increased use 

 of native materials, the policy of the State Highway Department, which aims 

 to build roads of a fairly permanent character, calls for great care in the 

 choice of the material, or of two or more materials which may be successfully 

 combined. In order to discover what road materials are available, in New 

 Hampshire, and how they are distributed, the writer was engaged by the 

 State Highway Commissioner to make a geological reconnaissance of the State, 

 and to supplement this with such detailed local studies as the field-work or 



