CHAPTER III. 43

THE SUN. Schwabe and the sun-spot period—Researches of Wolf, Lamont, Sabine, Gautier—Observations of Carrington and Spörer—Career and work of Fraunhofer—Spectrum analysis—Work of Kirchhoff—Solar eclipse work—The Solar prominences—Janssen and Lockyer—Huggins and Zöllner—Work of Young—The Italian spectroscopists, Secchi, Respighi, Tacchini—Career of Tacchini—The reversing layer—The Corona—Doppler’s principle—Rotation of the Sun—Work of Dunér—Janssen’s solar atlas—Maunder and magnetism—Solar theories—Distance of the Sun—Summary