95 



VOLUME 3. 



53. The Effect of Pressure upon Electric Furnace Spectra. 



Arthur S. King. 20 pp., 2 pi. 



54. Motion and Condition of Calcium Vapor over Sun-Spots 



and other Special Regions. Charles E. St. John. 45 

 pp., 2 pi. 



55. The Zeeman Effect for Vanadium. Harold D. Babcock. 



16 pp. 



56. The Influence of a Magnetic Field upon the Spark Spectra 



of Iron and Titanium Summary of Results. Arthur 

 S. King. 26 pp., 4 pi. 



57. Note on the Grouping of Triplet Separations Produced by 



a Magnetic Field. Harold D. Babcock. 6 pp. 



58. An Investigation of the Spectra of Iron and Titanium under 



Moderate Pressures. Henry G. Gale and Walter S. 

 Adams. 38 pp., 3 pi. 



59. The Three-Prism Stellar Spectrograph of the Mount Wilson 



Solar Observatory. Walter S. Adams. 20 pp., i pi. 



60. The Effect of Pressure upon Electric Furnace Spectra. 



Second Paper. Arthur S. King. 30 pp., 3 pi. 



61. Tertiary Standards with the Plane Grating. The Testing 



and Selection of Standards. First Paper. Charles E. 

 St. John and L. W. Ware. 40 pp., i pi. 



62. Observations of the Spectrum of Nova Geminorum No. 2. 



Walter S.Adams and Arnold Kohlschutter. 29 pp. ,3 pi. 



63. The Integrated Spectrum of the Milky Way. E. A. Path. 



6 pp., i pi. 



64. The Algol Variable RR Draconis. Frederick H. Seares. 



17 pp. 



65. On the Occurrence of the Enhanced Lines of Titanium in 



Electric Furnace Spectra. Arthur S. King, n pp., 



3 Pl- 



66. The Variation with Temperature of the Electric Furnace 



Spectrum of Iron. Arthur S. King. 43 pp. 



67. The Spectra of Spiral Nebulae and Globular Star Clusters. 



Third Paper. E. A. Path. 6pp. 



68. The Algol Variable RR Draconis. Second Paper. Fred- 



erick H. Seares. 18 pp. 



69. Radial Motion in Sun-Spots. I. The Distribution of 



Velocities in the the Solar Vortex. Charles E. St. 

 John. 32 pp., I pi. 



