TABLE OF CONTENTS 



PAGE 



LIST OF ILLUSTRATIONS xi 



CHAPTER I 



ERRATUM 



Page 86, after "Report on the Awarding of the Henry Draper Medal to 

 George Ellery Hale " insert 



" The Henry Draper Gold Medal, awarded to W. W. Campbell, of Lick 

 Observatory, Mount Hamilton, California, during the meeting of the National 

 Academy of Sciences, held in Washington, April 16-18, 1906." 



ERRATUM 



Page 341 under " Deceased Members", after Brown-Sequard insert BRUSH, 

 GEORGE JARVIS, elected 1868, died February 6, 1912. 



IX 



