Dr. Charles Greeley Abbot, of the Smithsonian Institution who last Spring made scientific history with his measurements of the sun's heat (TIME, May 5), has now, from the Mt. Wilson observatory, analyzed the heat of nine other great starsRigel, Vega, Sirius, Procyon, Capella, Aldebaran, Betelgeuse, Alpha Herculis, Beta Pegasi. He employs the Nichols radiometer, a delicate instrument worked by heat, like the little vanes revolved by sunlight in optician's windows. The stars' light is broken up by the spectroscope into their respective spectra or color bands, the heat in the different parts of...
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