244 MATH RWS ANT) LITTLE GEOLOGY AND GEOGRAPHY IN THE U. S. 



14-00 



1300 



IZOO 



IIOO 



fOOO 



900 



iiig- of scientific results and the 

 advancement of new scientific 

 principles from the newly a(^ 

 quired facts confirms the state- 

 ment of Brooks, that "there is. 

 liowever, grave danger that, car- 

 ried away by the present fervor 

 of practical results, we may lose 

 sight of our scientific ideals." 



VOLUME 



&D0 



lOO 



600 



500 



WO 



These bibliographic fists for 

 the decade include 2,156 authors, 

 who wrote 12,559 articles consist- 

 ing of 414,430 pages ranging 

 from duodecimo to elephant folio. 

 Of the authors, nearly 1,000 have 

 not been included in our person- 

 nel lists because of death, nation- 

 ality, profession, or insignificance 

 2 00 of geological contribution. Ap- 

 proximately 45 per cent of all the 

 articles listed are less than 5 

 pages in length, over 65 per cent 

 less than 15 pages, 85 per cent 

 are under 50 pages, and less than 

 1 per cent over 500 pages. Con- 

 sidering the descriptive character of most geological and geographical 

 papers, little real scientific matter is to be expected in the shortest articles. 

 This generalization has been confirmed by an examination of many of 

 the short papers. The annual production of papers on the geology of 

 North America, exclusive of binding and advertising pages, might be 

 estimated at something like 10 to 12 shelf feet a year. 



SUBJECT-MATTER 



The subject-matter of the publications listed in Bulletin 698 (1918) 

 may be classed as follows : 



I8S0 



/900 



/9J0 



/9Z0 



FicuRE 4. — Number of Articles puhlished on 

 yorlh American Geology 



General, including addresses and bibliographies. 



Economic 



Dynamic and structural 



riiysiographic, glacial, and pedology 



7 per cent 



45 

 7 

 6 



