The Astrophysical Journal 



An International Review of Spectroscopy 

 and Astronomical Physics 



Edited by George E. Hale and Edwin B. Frost, with the collaboration of J. S. 

 Ames, A. Belopo'sky, W. W. Campbell, Henry Crew, N. C. Duner, C. Fabry, C. 

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The Amrojphysic.il J 



progress ha* been made in recent years, and 

 applied. It publishes in English original conti 



would be inaccessible to most of ks readers? Special attention is given to having its illustration* 

 represent the highest quality of engraving available, and in this respect it is unexcelled among 

 scientific publications. The Journal is the medium of publication of the astrophysical researches 

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pages. It contains a department of reviews, in which all books within its field receive critical notice. 

 Issued monthly except February and August. $4.00 a year j single copies 60 

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The Botanical Gazette 



A Monthly Review of Botanical Science 



Editors : John M. Coulter and Charles R. Barnes. 



I Gazett 



or Students," in 

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The Journal of Geology 



A Semi-Quarterly Magazine of Geology and Related Sciences 



Editors : T. C. Chamberlin, in General Charge, R. D. Salipbury, J. P. Iddings, 

 Btnart Weller, R. A. F. Penrose, Jr., C. R. Van Hise, W. H. Holmes, S. W. 

 Wilhston. Associate Editors : Sir Archibald Geikie, H. Rosenbusch, Charles 

 Barrpis, Albrecht Penck, Hans Reusch, Gerard De Geer, C. K. Gilbert, H. S. 

 Williams, C. D. Walcott, J. C. Branner, W. B. Clark, O. A. Derby, T. W. E. David. 



While cultivating all geological fields, the Journal of Geologv is recognized as the foremost 

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 I d 6nta L^f V181 ^ n8 — carrent doctrine that grow out*of it. The Journal also "makes a specialty of 

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 msome special sense, it is also cosmopolitan. It has recently published papers relating to the 

 geology of Europe, Asm, Africa, South America, Iceland, New Zealand, and the Falkland Islands. 

 As a pronounced evolution of new views is in progress and is likely to grow in importance, the 

 journal win become more and more indispensable to every progressive geologist. 

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