RESEARCHES IN STELLAR PHOTOMETRY 
DURING THE YEARS 1894 TO 1906 
MADE CHIEFLY AT THE 
YERKES OBSERVATORY 
BY 
JOHN A. PARKHURST, S. M., 
Instructor in Practical Astronomy in the University of Chicago. 
WASHINGTON, D. C.: 
F^ublished by the Carnegie Institution of Washington 
October, 1906'' 
