TABLE OF CONTENTS. 



PREFACE Pao-e 



e> v 



111 



ASTROXOMY. By Edward S. Holden, U. S. Xaval Observatory, Wash- 

 ington 1 



Introduction 1 



Nebulae and the Xebular Hypothesis 2 



Xew Stars 4 



Double, Multiple, and Binary Stars G 



Star Catalogue and Maps 9 



The Sun n 



Planets, Asteroids, and Satellites 17 



The Moon 23 



Comets 25 



Spectroscopic Observations 26 



Zodiacal Light 26 



Time 27 



Instruments and Observatories 28 



Astronomical Instruments 28 



Publications and Reports 32 



Astronomical Bibliography 34 



Reports of American Observatories 35 



Albany, X. Y. : Dudley Observatory 36 



Allegheny, Pa. : Allegheny Observatory 38 



Cambridge, Mass. : Harvard College Observatory 39 



" " L. Trouvelot's Physical Observatory 41 



Chicago, 111. : Dearborn Observatory 42 



Cincinnati, O. : Cincinnati Observator\ r 43 



Gettysburg, Pa. : Pennsylvania College Observator) r 43 



Glasgow, Mo. : Morrison Observatory 44 



Hartford, Conn. : Private Observatory. 45 



Hastings-on-Hudson, X. Y. : Dr. Henry Draper's Observatory 46 



Xew Haven, Conn. : Observatory of Yale College 46 



Princeton, X. J. : Princeton College Observatory 46 



Quebec, Observatory of 48 



Ripon, Wis. : Observatory of Ripon College 48 



Rochester, X. Y. : Rochester Observatory 49 



San Francisco, Cal. : Lick Observatory 49 



South Bethlehem, Pa. : Lehigh University Observatory 50 



Poughkeepsie, X. Y. : Observatory of Vassar College 51 



Williarostown, Mass. : Hopkins Observatory, Williams College 51 



