SCIENCE 



Editorial Committee : S. Newcomb, Mathematics ; E. S. Woodward, Mechanics ; E. C. Pickering 



Astronomy; T. C. Mendenhall, Physics; E. H. Thurston, Engineering; Ira Eemsen, Chemistry; 



J. Le CoNTE, Geology; "VV. M. Davis, Physiography; Henky F. Osborn, Paleontology; W. K. 



Brooks, C. Hart Mekriam, Zoology; S. H. Scudder, Entomology; C. E. Bessey, N. L. 



Britton, Botany; C. S. Minot, Embryology, Histology; H. P. Bowditch, Physiology; 



J. S. Billings, Hygiene; J. McKeen Cattell, Psychology; Daniel G. Brin- 



TON, J. W. Powell, Anthropology. 



Friday, May 5, 1899. 



CONTENTS: 

 ' Observaiions of the Planet Mars:' Professor G. 



SCHIAPARELLI 633 



Dr. Alexander Graham Bell on the Development by 

 Selection of Supernumerary Mammas in Slieep. 

 (With Plate V.) 637 



Latest Volcanic Ernptions of the Pacific Coast: J. 

 S DiLLEE 639 



The Prospective Place of the Solar Azimutli Tables 

 in the Problem of Accelerating Ocean Transit : G. 

 W. Littlehales 640 



Some New American Fossil Fishes : C. E. Eastman. 642 



Jiapidity of Sand-Plain Growth: M. L. Fuller.. 643 



Proposed Survey of the Nile 644 



Scientific Books .•— 



Evans on Birds : Dr. J. A. ALLEN. Dav- 

 enport's Experimental Blorphology : Professor 

 T. H. Morgan. Ferivom's General Physiology : 

 Professor D. T. MacDougal General 647 



Scientifie Journals and Articles 651 



-Societies and Academies : — 



The Philosophical Society of Washington: E. D. 

 Preston. The Entomological Society of Wash- 

 ington: Dr. L. O. Howard. The New York 

 Academy of Sciences ; Section of Astronomy and 

 Physics: Ur. Wm. S. Day. The New York 

 Section of the American Chemical Society: Dr. 

 DuRAND Woodman 652 



Discussion and Correspondence : — 



3Iessrs. Lehmann and Hansen on Telepathy : 

 Professor William James. Two Correc- 

 tions: Professor Burt G. Wilder 654 



Notes on Physics : — 



A New Theory of the Zeeman Effect; Daylight- 

 Phosphorescence : A.. St.C. D 655 



Notes on Inorganic Chemistry : J. L. H 656 



Current Notes on Meteorology : 

 Blue Hill Observatory Bulletins ; Snow Pollers ; A 

 Course in Meteorology at Ohio State University ; 

 Climate of the Congo Free State : E. DeC. Ward. 657 



A New Marine Biological Laboratory : Dr. Hugh 



M. Smith 658 



Theory of the Steam Engine: Professor E. H. 

 Thurston 659 



The Philadelphia Exposition of 1900 659 



-Scientifie Notes atid Neivs 660 



University and Educational News 664 



' OBSEB VA TIONS OF THE PLANET MABS.'* 

 This is the first volume of a series wliich 

 promises to be important for tlie physical 

 study of the planets. It contains a detailed 

 account of the observations made on the 

 planet Mars during an interval of ten 

 months (June, 1894— March, 1895) by Mr. 

 Percival Lowell and his two collaborators, 

 W. H. Pickering and A. E. Douglass. The 

 observatory, especially constructed near the 

 small town of Flagstaff, occupies a central 

 position in the great plateau of Arizona, at 

 an elevation of 7,250 feet above the level of 

 the sea, in latitude 35° 11' and longitude 

 111° 40' west of Greenwich. The choice of 

 that location has been justified by the 

 success attained. During the six months 

 from June to November, 1894, the planet 

 could be observed on nearly every day. On 

 two days out of three it was possible to re- 

 cord useful observations of difiBcult objects. 

 The atmospheric conditions prevailing dur- 

 ing that period (and often during the fol- 

 lowing winter as well) aresufBciently char- 

 acterized by the discovery of a great number 

 of details unknown to previous observers. 

 These observations suffice to give an idea of 

 the optical perfection of the instrument em- 

 ployed, wliich had an objective by Brashear, 

 * Annals of the Lowell Observatory. Vol.1. — Ob- 

 servations of the Planet Mars during the opposition 

 of 1894-95, made at Flagstaff, Arizona. Percival 

 Lowell, Director of the Observatory. Boston and 

 New York, Houghton, Mifflin & Co. 1898. Pp. xii + 

 392. Large quarto. Plates, xxi. 



