*7^fc? Copyright, 1896, by W. B. Saunders. Repri 



. , _ . ^ ^ Reprinted September, 1896. Re- 



vised, reprinted, and recopyrighted August, 1898. Reprinted November, 

 hA I ^i--' 1898. Revised, reprinted, and recopyrighted August, 1900. Reprinted 



III f^ June, 1901. Revised, entirely reset, reprinted, and recopyrighted May, 



1903, Reprinted August, 1904. Revised, reprinted, and recopyrighted 

 May, igo6. Reprinted August, 1907, and May, igo8. Revised, reprinted, 

 and recopyrighted August, 1909. Revised, reprinted, and recopyrighted 

 September, 1912. Reprinted Maj^, 1914. Revised, entirely reset, re- 

 printed, and recopyrighted November, 19x5. 



I^/C 



Copyright, 1915, by W. B. Saunders Company. 



PRINTED IN AMERICA 



PRESS OF 



W. B. SAUNDERS COMPANY 



PHILADELPHIA 



