256 



SCIENCE. 



[N. S. Vol. XV. No. 372. 



dent, W. W. Campbell; Treasurer, C. L. Doo- 

 little. 



For 1902-3: Councilor, E. C. Pickering; Coun- 

 cilor, R. S. Woodward. 



Holdovers: Secretary, George C. Comstock; 

 Councilor, S. J. Brown; Councilor, Ormond 

 Stone. 



RESOLUTIONS ADOPTED. 

 Resolved, That the members of the Astronom- 

 ical and Astrophysical Society in attendance at 

 this meeting hereby tender their cordial thanks 

 to the Board of Management of and to the mem- 

 bers of the Cosmos Club for the use of the Club, 

 Assembly and Council rooms, for the excellent fa- 

 cilities afforded for the illustration and exposi- 

 tion of the papers presented at this meeting, and 

 for the kindly social courtesies extended to all 

 members of our Society. 



Resolved, That the thanks of this Society be 

 tendered to Professor S. P. Langley for the spe- 

 cial opportunity afforded by him to visit the 

 Astrophysical Observatory of the Smithsonian 

 Institution. 



Resolved, That the thanks of the Astronomical 

 and Astrophysical Society be tendered to the 

 Philosophical Society and to its treasurer, Mr. 

 Bernard R. Green, for the use of apparatus and 

 courtesies shown during the present meeting of 

 the Astronomical and Astrophysical Society. 



Resolved, That the Secretary of the Society be 

 requested to transmit the substance of these reso- 

 lutiona to the Board of Management of the Cos- 

 mos Club, to Professor S. P. Langley and to the 

 officers of the Philosophical Society respectively. 



Resolved, That the members of the Society in 

 attendance hereby express their cordial apprecia- 

 tion of the active services of the President in per- 

 fecting all arrangements for this meeting and in 

 providing so amply for social as well as for as- 

 tronomical and astrophysical entertainment. 



PAPERS PRESENTED. 



1. 'The Flash Spectrum, May 18, 1901': S. A. 

 Mitchell. [Read by J. K. Rees.] 



2. 'Lick Observatory-Crocker Expedition to 

 Sumatra to observe the Total Solar Eclipse of 

 May, 1901'; C. D. Perrine. [Read by W. W. 

 Campbell.] 



3. 'U. S. Naval Observatory Eclipse Expedition 

 to Sumatra': A. N. Skinner. 



4. 'Astronomical Photography with the Forty- 

 inch Refractor and the Two-foot Reflector of the 

 Yerkes Observatory': G. W. Ritchet. [Read by 

 G. E. Hale.] 



5. 'On the Phenomenon called Signals from 

 Mars ' : Percival Lowell. 



6. 'Preliminary Statement of Results of Inter- 

 national Magnetic Observations during the Total 

 Solar Eclipse, May, 1901': L. A. Bauer. 



7. 'Meridian Circle Positions of Nova Persei': 

 R. H. Tucker. [Read by W. W. Campbell.] 



8. 'Note on the Parallax of Nova Persei': F. 

 L. Chase. 



9. 'Note on the Parallax of Nova Persei': R. 

 G. Aitkin. [Read by W. W. Campbell.] 



10. 'The Energy of Condensation of Stellar 

 Bodies': R. S. Woodward. 



11. 'Optical Distortion of Photographic Tele- 

 scopes': Harold Jacoby. 



12. 'The Constant of Aberration': C. L. Doo- 



LITTI.E. 



13. 'The Period of Delta Equulei': W. J. 

 HussEY. [Read by W. W. Campbell.] 



14. 'Duration of Twilight at Different Alti- 

 tudes within the Tropics': S. I. Bailey. 



15. 'The Determination of Double Star Orbits': 

 George C. Comstock. 



16. 'A Cosmic Cycle': F. W. Very. 



17. 'A Comparison of Printing and Recording 

 Chronographs': C. S. Howe. 



18. 'The Clock Room at Case Observatory'; C. 

 S. Howe. 



19. 'The Almucanter as an Instrument for the 

 Determination of Time': C. S. Howe. 



20. 'A Description of the Second (Chile) Mills 

 Spectrograph': W. W. Campbell. 



21. 'The Capture of Comets by Jupiter': Per- 

 cival Lowell. 



22. 'The Latitude- Variation Observatory of 

 the International Geodetic Association': H. S. 

 Davis. 



23. 'Some Vices and Devices in Astronomical 

 Computations': H. S. Davis. 



24. 'On the Pressure of Light and Heat Radia- 

 tion': E. F. Nichols. 



2.5. 'The Mass of Titan and its Perturbations 

 of Hyperion': W. S. Eichelberger. 



26. 'Observations of November Meteors': C. A. 

 Post and J. K. Rees. 



27. 'A Kinematic Study of Hansen's Ideal Co- 

 ordinates': K. Laves. (Read by title only.) 



28. 'The Computation of Laplace's Coefficients 

 by means of Gylden's y Coefficients': K. Laves. 

 (Read by title only.) 



29. 'A Theorem Concerning the Method of 

 Least Squares': Harold Jacoby. (Read by title 

 only.) 



30. 'The Nebula about Nova Persei': F. W. 

 Very. 



