AMERICAN JOURNAL OF SCIENCE 55 



resulted from the increased activity of scientific societies 

 and academies at numerous centers and the springing 

 into existence thereby of new organs of publication 

 through them, as also through certain of the Government 

 Departments, the Carnegie Institution, and certain uni- 

 versities and museums. 



As bearing upon this subject, the following list of the 

 more prominent scientific periodicals started in this 

 country since 1867 is not without interest : 



1867- . American Naturalist. 



1875- . Botanical Bulletin; later Botanical Gazette. 



1879-1913. American Chemical Journal. 



1880-1915. School of Mines Quarterly. 



1883- . Science. 



1885- . Journal of Heredity. 



1887- . Journal of Morphology. 



1887-1908. Technology Quarterly. 



1888-1905. American Geologist. 



1891- . Journal of Comparative Neurology. 



1893- . Journal of Geology. 



1893- . Physical Keview. 



1895- . Astrophysical Journal. 



1896- . Journal of Physical Chemistry. 

 1896- . Terrestrial Magnetism. 

 1897-1899. Zoological Bulletin; followed by 



1900- . Biological Bulletin. 



1901 . American Journal of Anatomy. 



1904- . Journal of Experimental Zoology. 



1905- . Economic Geology. 



1906- . Anatomical Record. 



1907- . Journal of Economic Entomology. 

 1911- . Journal of Animal Behavior. 

 1914 . American Journal of Botany. 

 1916- . Genetics. 



1918- . American Journal of Physical Anthropology. 



The result of the whole movement has been of neces- 

 sity to narrow, little by little, the sphere of a general 

 scientific periodical such as the Journal has been from 

 the beginning. The exact change might be studied in 

 detail by tabulating as to subjects the contents of succes- 

 sive volumes, decade by decade, from 1870 down. It is 

 sufficient, here, however, to recognize the general fact 

 that while the number of original papers published in the 



