Publications of the Astronomical Society of the Pacific, Volumes 57-58

absorption appear astronomical atoms August bright California called changes close comet complete components continued Córdoba corona December determined direct director displacements distance early eclipse emission fact February field Figure give given important indicate intensity interest January July June km/sec known length Lick Observatory light lines magnitude March mathematics maximum mean measured meeting meteorites methods Michigan moon motion Mount Wilson Observatory nebulae NOTES nova objects Observatory observed obtained October orbit origin Pacific period photographic photographic magnitude plates position possible present probably problem Professor prominence Publications radial region relative seen September Society solar spectra spectrograms spectrum stars stellar strong sunspot Table taken telescope texts theory tion United University variable velocity visible visual