Publications of the Astronomical Society of the Pacific, Volume 39

A. L. BLACK absolute magnitude absorption appearance Astronomical Society atmosphere atom bands bright Bruce Medal C. H. ADAMS C. S. CUSHING Calif California cerium clouds Comet Medal computed curve Cygni dapd determined Director double star Earth eclipse emission faint hydrogen infra-red instrument interest investigations ionized J. H. MOORE July June Jupiter latitude lectures Lick Observatory light lines longitude Lowell Observatory magnetic magnitude Mars Martian mean motion measures Moon Mount Hamilton Mount Wilson Observatory nebulae observations orbit P. W. MERRILL Pacific period photographs planet planetary plate polar present Professor Publications R. G. AITKEN radial velocities radiation region right ascension San Francisco solar spectral type spectrograms spectroscopic spectrum spots ߃ stars stellar sun-spot surface telescope temperature tion ultra-violet University variable variable stars violet wave-lengths Yerkes Observatory βγ вр