SCIENCE 



[N. S. Vol. XL VI. No. 1193 



Councillors — Ernest W. Brown, Edwin B. Frost, 

 J. S. Plaskett, Joel Stebbins. 



The next meeting of the society will be held at 

 the Harvard Observatory about September 1, 1918. 



Following is the list of papers presented at the 

 meeting, the abstracts of which are published in 

 Popular Astronomy: 



Sebastian Albreeht : On the variation in spectral 

 type of the fourth-class variable star I CarincB. 



S. I. Bailey: Note on the variable stars in the 

 globular cluster Messier IS. 



L. A. Bauer: A brief statement of the work of 

 the Committee on Navigation and Nautical Instru- 

 ments of the National Eesearch Council. 



E. E. Candor : A mechanical device for interpola- 

 tion. 



Annie J. Cannon: Distribution of light in 

 stellar spectra. 



J. B. Cannon: Note on two spectroscopic bi- 

 naries. 



W. A. Conrad: Note on a possible explanation 

 of erratic jumps in clock rates. 



B. H. Curtiss: Spectra of Nova Geminorum No. 

 S and other stars. 



Ealph E. De Lury: A new form of spectroeom- 

 parator. 



A. E. Douglass : The Steward Observatory of the 

 University of Arizona. 



A. E. Douglass : An optical periodograph. 



Eaymond S. Dugau: On the eclipsing variable 

 iJ Canis Majoris. 



W. S. Eiehelberger : Eccentricity and longitude 

 of perisaturnium of the orbits of Enceladus, 

 Tethys and Dione. 



W. S. Eiehelberger: The obliquity of the ecliptic 

 from the Sun observations made at the U. S. Naval 

 Observatory, 1903-1911. 



W. S. Eiehelberger: The refraction at Wash- 

 ington. 



W. S. Eiehelberger and F. B. Littell: Day ob- 

 servations minus night observations. 



W. S. Eiehelberger and H. E. Morgan: Com- 

 parison of Washington right ascensions with those 

 of Newcomb, Auwers, Boss, Hedriek and Poulkowa, 

 1905. 



W. S. Eiehelberger and H. E. Morgan: Com- 

 parison of Washington declinations with those of 

 Newcomb, Auwers and Boss. 



George E. Hale: The best service of astronomers 

 in time of war. 



W. E. Harper: Notes on some spectroscopic bi- 

 naries. 



C. C. Kiess : On the presence of rare earths in 

 a Canum T enaticorum. 



E. S. King: Some recent work in photographic 

 photometry. 



Jacob Kunz and Joel Stebbins: Photo-electric 

 observations of new variable stars. 



C. O. Lampland: Measures of position of the 

 nucleus of the great nebula in Andromeda. 



C. O. Lampland: Eecent observations of Nova 

 Persei 1901. 



C. O. Lampland: Photographic observations of 

 the variable nebute N.G.C. 2261 and N.G.C. 6729. 



F. B. Littell: Variation of latitude at the U. S. 

 Naval Observatory. 



W. F. Meggers: Photography of the solar spec- 

 trum. 



Paul W. Merrill: Photography of the extreme 

 red and infra-red portions of stellar spectra. 



Joel H. Metcalf: A comparison of an 8-inch 

 doublet with a 10-ineh triple anastigmatie lens. 



G. H. Peters: The photographic telescope of the 

 U. S. Naval Observatory. 



E. C. Pickering: Variation in light of asteroids. 

 W. P. Eigge: The total solar eclipse of June 8, 



1918, as visible in the United States. 



Luis Eod^s: Direct application of Wulf's elec- 

 trometer for recording the time sent by wireless 

 telegraphy, and its connection with the potassium 

 photo-electric cell to register the duration of total- 

 ity in a solar eclipse. 



H. B. Eumrill : A plea for the small telescope. 



H. N. Eussell: The masses of the stars. 



H. N. Eussell: On the calculation of the orbits 

 of visual binaries. 



H. N. Eussell: New double star orbits. 



F. H. Seares, A. Van Maanen and F. BUerman: 

 Location of the sun's magnetic axis. 



H. T. Stetson: Some recent improvements in 

 thermo-electric apparatus for photographic pho- 

 tometry. 



Frank Schlesinger: Determination of stellar par- 

 allaxes at the Allegheny Observatory. 



V. M. Slipher: Observations of the aurora spec- 

 trum. 



V. M. Slipher: Speetrographic observations of 

 star clusters. 



E. Triimpler: Preliminary results on the consti- 

 tution of the Pleiades group. 



David Todd: Weather prospects along the cen- 

 tral line of total eclipse, 1918, June 8. 



A. Van Maanen: Discussion of the Mt. Wilson 

 parallaxes. , 



F. W. Very: On a possible limit to gravitation. 



Joel Stebbins, 

 Acting Secretary 



