iresent the highest quality of engraving available, and in 

 gntiflc publications. The Journal is the medium of public; 

 de at Yerkes Observatory, and at the newly established Sola 



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. Belopolsky, W. W. Campbell, Henry Crew, IS". C. Duner, C. Fabry, C. 

 S. Hastings, William Huggins, H. Kayser, A. A. Michelson, Ernest F. Nichols, A. 

 Perot, E. C. Pickering, A. Bicco, C. Bunge, Arthur Schuster, and F. L. O. Wadsworth. 



The Astrophysical Journal, an international review of spectroscopy and astronomical physic*, 

 is the only publication in the world devoted to this department of astronomy, in which so great 



applied. It publishes in English original contributions from investigators in all parts of the world, 

 together with translations of important papers communicated to foreign learned societies which 



■ * its readers. Specia 1 



>f engraving availal 

 irnal is the medium 

 d at the newly establ 



important astrophysical results obtained at the Lick Observatory are found in its 

 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 ; single copies 50 

 cents. Foreign postage 62 cents. 



The Botanical Gazette 



A Monthly Review of Botanical Science 



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



The Botanical Gazette is the leading American journal of botany, and its contents therefore 

 ' . , < ,ipj,h tlK » ire niw so rapid 



1 ' -tut'. \i-,-ti *' 'ii.itun 



! - * ' 11 '< I > 1 'll U I, 1^ !•!' 



j •• . ; ' • Ull u r~. i l'f 'v< ri.i n v^-v, i t- toh !,iJ-r.h , that t!i. j. ;> giv^s a c»m- 



1 Issued monthly. §7.00 a year ; single copies 75 cents. Foreign postage 84 cents. 



The Journal of Geology 



A Semi-Quarterly Magazine of Geology and Related Sciences 



Editors : T. C. Chamberlin, in General Charge, E. D. Salisbury, J. P. Iddings, 

 Stuart Wdler, B. A. F. Penrose, Jr., C. B. Van Hise, W. H. Holmes, S. W. 

 Williston. Associate Editors: Sir Archibald Geikie, H. Bosenbusch, Charles 

 Barrois, Albrecht Penck, Hans Eeusch, 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 i aW v • 



i - 1 . , ^ r . _ . <■■• i :.a-^-_- f 



5 * ~< - ' - - - t ' * / ' ; . *S\ i >s an 



•• ^- - ^ y ' l " r''' t, . r " x ' v "''* _ -V ^ f 1 rb - e 



- > * < * - w < n,, ur'i, e .be 



Journal will become more and moi 



$3.00 a year ; single copies 



Address Dept. 62 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO NEW YORK William Wesley & Son, L 



