Copyright, 1907, by W. B. Sp.unders Company. Revised, reprinted,, 



and recopyrighted July, 1913. Reprinted January, 1916, October, 



1917, May, 1918, and September 1919. Revised, reprinted, 



and recopyrighted September, 1920 



Copyright, 1920, by W. B. Saunders Company 



Reprinted June, 1924 ' 



MADE IN U. S. A, 



PRESS OF 



B. SAUNOERS COMPANY 

 PHIUADEL.PHI A 



