Natural Science Advertiser, June, 1896. 



$4.00 per Year. 



ft4.60 per Year (Foreign). 



THE 



35 cts. per Copy. 



AMERI6AN 

 NATURALIST 



A MONTHLY JOURNAL 



DEVOTED TO THE NATURAL SCIENCES 



IN THEIR WIDEST SENSE. 



Managing editors: 



Profs. E. D. COPE, Philadelphia, Pa., and J. S. KINGSLEY, Boston, Mass. 



ASSOCIATE EDITORS: 



Prof. W. S. BAYLEY, of Colby University, Waterville, Me., Dept. of Petrography. 



Prof. W. H. HOBBS, Madison, Wise, Dept. of Mineralogy. 



Dr. C. E. BESSEY, of The University of Nebraska, Lincoln, Neb., Dept. of Botany. 



Dr. ERWIN F. SMITH, Washington, D. C, Dept. of Vegetable Physiology. 



Prof. C. M. WEED, of College of New Hampshire, Durham, N.H., Dept. of Entomology. 



Prof. W. ROMAINE NEWBOLD, University of Pennsylvania, Dept. of Psychology. 



Prof. E. A. ANDREWS, of Johns Hopkins University, Baltimore, Md., Dept. of Embryology. 



H. C. MERCER, of the University of Pennsylvania, Dept. of Anthropology. 



Dr. C. O. WHITMAN, of Chicago University, Chicago, 111., Dept. of Microscopic Technique. 



1867 



30th YEAR. 



1896 



The American Naturalist differs from 

 most other journals in the extent and efficiency 

 of its editorial corps, which embraces eleven 

 men, mostly professors in well-known Uni- 

 versities in Maine, New Hampshire, Boston 

 (Mass.), Philadelphia, Baltimore, and Washing- 

 ton, and west to Chicago, Madison (Wise), 

 and Lincoln (Nebraska). This editorial super- 

 vision secures competent criticism of the 

 subject-matter, as well as breadth of scope. 

 In this way is secured also the principal aim 

 of The Naturalist, the presentation to the 

 public of the latest results of scientific progress 

 in readable form, while the just relations of 

 authors to their work and to each other are 

 strictly maintained. We are especially able 

 to present monographic abstracts of especial 

 departments of research, thus giving to our 

 readers at once comprehensive knowledge of 

 subjects, and bringing them en rapport with 

 the present state of science as well as with 

 the past. 



As heretofore The Naturalist endeavours 

 to keep its readers informed as to the pro- 

 ceedings of scientific societies and other 

 organisations for the promotion of science. 

 It is independent of official bodies, and insists 

 on proper administration of trusts held by 

 them for the benefit of science and education. 

 In performing this service it stands alone 

 among the scientific journals of the country, 

 and it bespeaks the support of the friends of 

 sound administration, in view of the fact that 

 in so doing it incurs the hostility of more or 

 less influential persons. 



The American Naturalist was com- 

 menced twenty-nine years ago by an asso- 

 ciation of the students of Professor Agassiz, 

 at Cambridge. While it has followed the 

 fortunes of its founders from comparative 

 youth to a vigorous maturity, it has gathered 

 to its support most of the biologists and 

 geologists of North America. Its constituency 

 of authors now includes a majority of the men 

 of this class in the country. 



THE EDWARDS & DOCKER (20., 



518 and 520 MINOR STREET, 



Advertising Rates will be furnished upon application. 



PHILADELPHIA, U.S.A. 



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