OCTOBEB 21, 1910] 



SCIENCE 



545 



The resolutions reported by the spectrohelio- 

 graph committee were as follows : 



1. That daily photographs of the calcium 

 floceuli be continued by the cooperating ob- 

 servatories. 



2. That provision be made, if possible, for 

 the measurement of the photographs. 



3. That the desirability of providing for the 

 daily photography of the hydrogen alpha floc- 

 euli be suggested to the cooperating observa- 

 tories. 



4. That the observatories at Tacubaya, Mex- 

 ico, and Madrid, Spain, be added to the list 

 of cooperating observatories and that their 

 directors, Messrs. Valle and Iniguez, be in- 

 vited to join this committee. 



5. That the advantage of undertaking work 

 with the spectroheliograph in Japan be sug- 

 gested to the Japanese government. 



6. That the desirability of utilizing large 

 spectroheliographs of high dispersion for the 

 study of the upper layers of the solar atmos- 

 phere is recognized by the committee. 



1. The committee express the hope that the 

 Secchi memorial fund now being raised in 

 Italy may be devoted to a tower telescope 

 equipped with a spectroheliograph. 



At the fourth session the conference voted 

 to extend the activities of the Solar Union so 

 as to include general astrophysics. A com- 

 mittee was appointed to examine and report 

 upon the question of the classification of stel- 

 lar spectra. 



The following resolution with regard to the 

 proposed solar observatory in Japan was 

 passed : 



That this conference learns with satisfac- 

 tion that the erection of a solar observatory 

 in Japan is in contemplation and expresses 

 the opinon that the establishment of such an 

 observatory would fill a gap in the distribu- 

 tion of solar observatories over the surface of 

 the earth, and would materially help in ob- 

 taining results of great value in the study of 

 solar phenomena. 



It was decided that the next meeting of the 

 Solar Union be held in Bonn in 191.3, the 

 exact date to be determined later. 



The following "committees were appointed 

 or reappointed: 



The Commitiee on Standards of Wave~ 

 lengths: PI. Kayser (chairman), J. S. Ames, 

 Ch. Fabry, A. A. Michelson, A. Perot. 



The Committee on the Measurement of 

 Solar Radiation: J. Violle (chairman), C. G. 

 Abbot (secretary), H. L. Callendar, C. Chis- 

 toni, W. H. Julius, A. Schuster. 



The Committee on WorJc with the Spectro- 

 heliograph: G. E. Hale (chairman), H. Des- 

 landres, E. B. Erost, W. J. Lockyer, A. Eicco, 

 Eather Cirera, Philip Valle, Francisco In- 

 iguez, P. Eversheim. 



The Committee on the Investigation of the 

 Spectra of Sun-spots: H. F. Newall (chair- 

 man), A. Fowler (secretary), A. Belopolsky, 

 The Astronomer Royal of England, Father 

 Cortie, H. Deslandres, G. E. Hale, Sir N. 

 Lockyer, P. Eversheim, A. Wolfer, Philip Fox, 

 Walter Mitchell and Walter S. Adams. 



The Committee for the Organization of 

 Eclipse Observations: Sir Norman Lockyer 

 (chairman), le Comte de la Baume Pluvinel 

 (secretary), W. W. Campbell, Father Cirera, 

 P. Kempf, H. H. Turner, A. Eicco, N. Don- 

 itch, Major E. H. Hills. 



The Committee on the Determination of 

 Solar Rotation hy Means of the Displacement 

 of Lines: N. C. Duner (chairman), W. S. 

 Adams, A. Belopolsky, H. Deslandres, J. 

 Halm, H. F. Newall, R. A. Sampson, F. W. 

 Dyson, Frank Sclilesinger, J. S. Plaskett, M. 

 Perot. 



Committee to Report upon the Question of 

 the Classification of Stellar Spectra: W. S. 

 Adams, W. W. Campbell, E. B. Frost, J. S. 

 Ames, J. C. Kapteyn, H. F. Newall, E. C. 

 Pickering (chairman), J. S. Plaskett, H. jST. 

 Russell, Frank Schlesinger, K. Schwarzschild, 

 J. Hartmann, G. E. Hale. 



On the evening of September 1 Mr. Abbot 

 lectured on the measurement of the solar con- 

 stant of radiation, while on the following 

 evening Professor Kapteyn gave an account 

 of his investigations of the systematic mo- 

 tions of the Orion stars. 



The 60-inch reflector was placed at the dis- 



