Copyright, 1896, by W. B. Saunders. Reprinted September, 1896. Re- 

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

 1898. Revised, reprinted, and recopyrighted August, 1900. Reprinted 

 June, 1901. Revised, entirely reset, reprinted, and recopyrighted May, 

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

 May, 1906. Reprinted August, 1907, and May, igo8. Revised, reprinted, 

 and recopyrighted August, igog. Revised, reprinted, and recopjrrighted 

 September, igi2. Reprinted May, 1914. Revised, entirely reset, re- 

 printed, and recopyrighted November, igiS- Revised, entitely reset, re- 

 printed, and recopyrighted August, 1919. 



Copyright, 1919, by W. B, Saunders Company. 



PRINTED IN AMERICA 



