542 



SCIENCE 



[N. S. Vol. LII. No. 1353 



Notes on changes in the spectrum of tj Carince: 



Annie J. Cannon. 

 A probable factor in the widening and increase in 



wave-lengths of the spectrum lines near the limj> 



of the sun: Ealph E. DeLtiry. 

 The constancy of the solar wave-lengths and the 



possibility of determining the solar distance 



therefrom: Ealph E. DeLurt and H. E. Kings- 

 ton. 

 Notes on tlie solar rotation: Ealph E. DeLurt and 



John L. 'Connor. 

 Map of Mars in 19S0 and method of producing it 



from drawings: A. E. Douglass. 

 A photometric study of Y Camelopardalis : E. S. 



Dugan. 

 The plwtometrio fields of three TerTces telescopes : 



Alice H. Earnsworth. 

 Circulation of calcium flocculia about sun-spots: 



Philip Fox. 

 Note on Nova Cygni No. 3: Edwin B. Frost. 

 Some recent photographs taken with the 100-inch 



HooTcer telescope: George E. Hale. 

 The Mount Wilson photographic map of the sun- 

 spot spectrum: George E. Hale and Ferdinand 



Ellbrman. 

 The orbit of the spectroscopic binary H. B. 6385: 



W. E. Harper. 

 / The light-curve of Eros in 1914: A correction to 



the results previously published: Margaret Har- 



"WOOD. 



A curious effect of superposition of two photo- 

 graphic plates: F. Henroteau. 



A graphical construction for obtaining the period 

 of a phenomenon: F. Henroteau. 



Nova Cygni No. 3. Preliminary results: F. Hen- 

 roteau and J. P. Henderson. 



The spectroscopic binary v Eridani: F. Henroteau 

 and J. P. Henderson. 



New lines in tlie spectrum of oxygen: C. C. Kiess. 



V elocity-curves for spectroscopic binaries : Edward 

 S. King. 



Photometry of eclipsed moon: Edward S. King. 



The eclipsing binaries /x^ Scorpii and V Puppis: 

 Antonia C. Maurt. 



Parallax results obtained at the.Yerkes Observa- 

 tory: Oliver J. Lee and George van Bies- 

 broeck. 



Photographic zenith tube at the U. S. Naval Ob- 

 servatory, 1915.9-1920.0: F. B. Littell. 



The systematic errors of stellar parallaxes deter- 

 mined by photography at the Leander MoCor- 

 mick Observatory : S. A. Mitchell. 



Absorption of the photographic rays by the at- 

 mospheric water content : George Henry Peters. 



The spectroscopic orbits and absolute dimensions 



of the eclipsing variables TX Beroulis and ¥ 



Cygni: J. S. Plaskett. 

 Whcji an eclipse prevented a war: William F. 



Eigge. 

 Direct micrometrical observations of the sun. 



Exact formulas: E. D. EoE, Jr. 

 The mensurational properties of the photographic 



plate: Frank E. Boss. 

 A solution of B minus D observations : Arthur J. 



EOY. 



The radial velocities of ten Oe5 stars: W. Carl 



EUFUS. 



On the probaMe diameters of the stars: Henry 



NORRIS EUSSELL. 



Badiation pressure and celestial motions: Henry 



NOERIS EuSSELL. 



The astronomical aspects of aether theory versus 



relativity: L. Silberstein. 

 Progress in photo-electric photometry, with a new 



light-curve of Algol: Joel Stebbins. 

 The investigation of plate errors in photographic 



photography : Harlan True Stetson. 

 Arlington time signals: E. Meldrum Stewart. 

 Temperature compensation of chronometers: E. 



Meldrum Stewart. 

 Canadian transcontinental longitudes: E. Mel- 

 drum Stewart. 

 Notes on the variables 9.1914 and BT Vulpeculoe: 



S. D. Townley. 

 A new method of observing the position of the 



centre of the sun: E. W. Willson. 

 The orbits of Carince, Doradus, and Sagittarii: 



Ealph E. "Wilson and C. M. Huffer. 

 The orbit of the spectroscopic binary S. B. 8800: 



Eeynold K. Young. 

 The stationary calcium lines in early type sta/rs: 



Eeynold K. Young. Joel Stebbins, 



Secretary 



SCIENCE 



A Weekly Journal devoted to the Advancement of 

 Science, publishing the official notices and pro- 

 ceedings of the American Association for 

 the Advancement of Science 



Published every Friday by 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



NEW YORK, N. Y. 



Entered in the post-a£ce at Lancuter, Pa., a« second clau matter 



