/^ORNELlX 



UNSVERSITYI 



\ ^ LIBRAR Y,^ 



First Edition, Crown %vo., July 1876. 



Reprinted April 1877, December iST], October 1880, 



November 1880, 1881, 1882, 1883. 



Kevised and Enlarged Edition February 1884. 



Reprinted 18S7, 1888. 



