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804
POPULAR SCIENCE MONTHLY.
faint nebulæ; observation of planets, satellites, and comets; photographic and spectroscopic investigation of conditions of the sun; researches on the spectra of fixed stars and nebula?; motion of stars in the line of sight. The Yerkes Observatory will, of course, be used only by advanced students capable of undertaking
Fig. 11.—The Telescope, Yerkes Observatory.
important and original investigation. The ordinary instruction for undergraduates and elementary students will continue to be given in the city at the university itself and at Kenwood Observatory. It would be a mistake to imagine that up to the present time the university has made no contribution to astronomical science. Important studies have been conducted by Prof. Hale,
