Natural Science Advertiser, Dccember, il 



LOO per Year. 



#4.60 per Year (Foreign). 



THE 



35 cts. per CopyJ 



AMERieAN 

 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. 



189^ 



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 endeavour 

 to keep its readers informed as to the pre 

 ceedings of scientific societies and othe 

 organisations for the promotion of science 

 It is independent of official bodies, and insis 

 on proper administration of trusts held I 

 them for the benefit of science and educatio 

 In performing this service it stands alon 

 among the scientific journals of the country 

 and it bespeaks the support of the friends c 

 sound administration, in view of the fact the 

 in so doing it incurs the hostility of more c 

 less influential persons. 



The American Naturalist was con 

 menced twenty-nine years ago by an assc 

 ciation of the students of Professor Agassi, 

 at Cambridge While it has followed th 

 fortunes of its founders from comparativ 

 youth to a vigorous maturity, it has gathere 

 to its support most of the biologists an 

 geologists of North America. Its constituenc 

 of authors now includes a majority of the me 

 of this class in the country. 



THE EDWARDS & DOCKER 60., 



518 AND 520 MINOR STREET, 



Advertising Rates will be furnished upon application. 



PHILADELPHIA, U.S.A. 



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