PUBLICATIONS IN THE 



A.stx*orioin^ and A-stropHysics 



The Study of Stellar Evolution : A Popular 

 Account of Modern Methods of Astrophysical 

 Research. By George E. Hale. 8vo, cloth. 



[In preparation.] 



Tells how the origin, development, and decay of celestial 

 bodies are studied in a tnodem observatory'. The explana- 

 tions of instruments and methods are accompanied by illus- 

 trations, and the most recent photographs obtained with the 

 telescopes of the Yerkes Observatory are reproduced in a 

 series of plates. 



General Catalogue of Double Stars. By Sher- 

 burne VV. BURNHAM. With illustrations. 

 xxxii-|-295 pp., 4to, cloth; net, $4.00; post- 

 paid, $4.32. 



Measures of Double Stars Made with the Forty- 

 Inch Refractor of the Yerkes Observatory in 

 1900 and igoi- By Sherburne W, Burn- 

 ham. 76 pp., 4to, paper; net, $1.00; post- 

 paid, $1.05. 



Micrometrical Observations of Eros Made with 

 the Forty-Inch Refractor of the Yerkes Ob- 

 servatory during the Opposition of 1900 



and 1901. By Edward E.Barnard. 40 pp., 



4to, paper; net, 50 cents; postpaid, 53 cents. 



Astronomical Photography with the Forty- 

 Inch Refractor and the Two-Foot Reflector 



of the Yerkes Observatory 

 .W. Ritchey. 



By George 



With 29 plates. 12 pp., 4to, 

 paper; net, 75 cents; postpaid, 80 cents. 



**Die Bilder der Nebelflecke gewahren einen ausserst 

 plastischen Eindruck." — Technische Literature. 



Radial Velocities of Twenty Stars Having 

 Spectra of the Orion Type. By Edwin B, 

 Frost and Walter S. Adams. With 3 



plates. 108 pp., 4to, paper; net, ^J. 50; post- 

 paid, $1.59. 



+ 



On the Spectra of Stars of Secchi's Fourth 



Type. By George E. Hale, Ferdinand 

 Ellerman, and John A. Parkhurst. With 



plates. 136 pp., 4to, paper; net, ^2.00; 

 postpaid, $2.11. 



The Rumf ord Spectroheliograph of the Yerkes 

 Observatory. By George E. Hale and 

 Ferdinand Ellerman. With 26 plates. 



18 pp., 4to, paper; net, 75 cents; postpaid, 81 

 cents. 



The Spectrum of the High Potential Dis- 

 charge between Metallic Electrodes in 

 Liquids and in Gases of High Pressure. 

 By George E. Hale and Morton A. Kent. 

 With 23 plates. 66 pp., 4to, paper; net, 75 

 cents; postpaid, 81 cents. 



Quantitative Classification of Igneous Rocks. 

 By Whitman Cross, Joseph Iddings, Louis 

 V.Pirsson, and Henry S. Washington. 286 



pp., 8vo, cloth ; net, ;?i.7S; postpaid, j5l. 91. 



**The publication of this work by four of the leading 

 petrographers of America marks a distinct epoch in the 

 study of igneous rocks and the handling of chemical analyses 

 in petrographic investigations."- — American Chemical 

 yournai^ 



"An important work." — Jaurna! 0/ American Chem- 

 ical Society, 



Glacial Studies in Greenland. By Thomas C. 



Chamberlin. 8vo, cloth, [In preparation.] 



Physics and CKemistry 



light Waves and Their Uses. By Albert 



A. Michelson. With 108 drawings and 3 

 colored plates. 174 pp., 8vo, cloth; net, $2,00; 

 postpaid, $2.13. 



**The presentation is so skilfully managed that the book 

 can scarcely fail to hold the interest of the general reader, 

 while at the same time physicists and astronomers will find 

 in it much valuable information." — A7nerican Journal of 

 Science, 



Physical Chemistry in the Service of the 

 Sciences. By Jacobus H. van 't Hoff. 



Translated by Alexander Smith, With 

 illustrations. xviii4-i26 pp., 8vo, cloth; net, 

 ;^i.50; postpaid, ^1.62. 



"The volume is an unusually elegant one, which makes 

 a strong appeal to the book-lover as well as to the chemist, 

 —Journal 0/ American Chemical Society. 



"Lucid, terse, concentrated." — Kno'wledge and Scten- 

 tific News (London). 



" Die Uebersetzung ist ausgezeichnet." — Zeitschrtfi 

 fiir physikalische Chemie^ 



The Role of Diffusion and Osmotic Pressure in 



xiv+ 



Plants. 



By Burton E. Livingston. 



8vo, cloth; net, j^i-fo; postpaid 



150 pp., 



$1.62. 



"An excellent and much-needed general treatment of the 

 diffusion and osmotic pressure in plants. The treatment o* 

 the whole subject is clear and concise, and forms an admi- 

 rable addition to the literature of physiological botany. ** 

 will be found indispensable to all students along these 

 Uncs/' -Plant IVorid. 



A Laboratory Guide in Bacteriology, ^y 



Paul G. Heinemann. vii-l-143 pp., i2mo, 

 cloth; net, $i.S^\ postpaid, $1.67. - 



A Laboratory Outline of Physiological Chem- 

 istry. By Ralph W. Webster and Walde- 

 MAR Koch, viii+io; pp., 8vo, cloth; net, 



S1.50; postpaid, $1.68. 



Reprints from the Publications of the Alem- 

 bic Club. The University of Chicago Press 

 is the sole American agent for these publica- 

 tions. The complete series is carried m 

 stock. For details, send for Catalogue. 



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