CONTENTS. 
PAGE 
Introduction, Plan of work, .i 
Chapter i.—Instruments,.5 
Chapter 2.—103 T Andromedae,.11 
Chapter 3.—267 V Andromedae,.31 
Chapter 4.—787 W Andromedae,.45 
Chapter 5.—4315 R Comae,.59 
Chapter 6.—5798 RU Herculis, ..73 
Chapter 7.—6100 RV Herculis,.87 
Chapter 8.—6894 S Lyrae,.103 
: Chapter 9.—7220 S Cygni,.117 
Chapter 10.—7269 SX Cygni,.133 
Chapter 11.—7458 V Delphini,.145 
Chapter 12.—8518 Z Cassiopeiae,.161 
Chapter 13.—8629 Y Cassiopeiae,.175 
Chapter 14.—General Conclusions, Precision of Measures, Limit of Vision, . . 187 
