PART I. AUTHOR-INDEX. 23 



Campbell, W. W. Hydrogen of the envelope of the star DM +30° 

 3639. Astron. and Astrophys. 12 (1893) 913-914; Beibh (1894) 



565- 



. Spectra of the Great Nebula in Orion and other well- 

 known nebulae. Astron. and Astrophys. 13 (1894) 384-398, 

 494-501; Beibl. (1895) 68. 



. The Wolf Rayet Stars. Astr.-Astroph. 13 (1894) 448- 



476; Beibl. (1895) 67. 



. Spectrum of Mars. Astr.-Astroph. 13 (1894) 752-760. 



. Review of the spectroscopic observations of Mars. As- 

 trophys. J. (1895) 28-44; Beibl. (1896) 37. 



. Recent changes in the spectrum of Nova Aurigae. As- 

 trophys. J. (1895) 49-51; Beibl. (1895) 432. 



. On determining the extent of a planet's atmosphere. 



Astrophys. J. i (1895) 85. 



. A spectrographic determination of velocities in the system 



of Saturn. Astrophys. J. 2 (1895) 127-135; Beibl. (1896) 201. 



. The visible spectrum of the Trifid Nebula. Astrophys. 



J. 2 (1895) 161. 

 . Note on the spectrum of the Aurora Borealis. Astroph. 



J. 2 (1895) 162. 



. Observations of the B band in stellar spectra. Astrophys. 



J. 2 (1895) 163. 



. Stars whose spectra contain both bright and dark hydro- 

 gen lines. i\strophys. J. 2 (1895) 177-184; Beibl. (1896) 372. 



. Observations of Nova (5533 R) Normae. Amer. J. Sci. 



(4) 15 (1895) loo- 

 . Melting of the Polar Cap of Mars. Pub. Astr. Soc. Pac. 



7 (1895) 292-293. 

 . Mr. Jewell's observations of the spectrum of Mars. As- 



trophys. J. 4 (1896) 79. 

 . Mr. Lowell's book on Mars. Pub. A. S. Pac. 8 (1896) 



207-220. 



. Notes on two variable stars. Astron. J. 16 (1896) 24. 



Spectroscopic Notes. Astrophys. J. 5 (1897) 233-242. 



. Variations observed in the Orion Nebula. Astrophys. J. 



6 (1897) 363. 



. Recent observations of the spectrum of Mars. Pub. A. S. 



Pac. (1897) 109-112. 



. Some stars with great velocities in the line of sight. As- 

 troph. J. 8 (1898) 157. 



