J^irsi Printed 1875. Printed and Stereotyped 1876. 



Reprinted ]\Iarch and yuly 1877, February and December 1879, 1881, 

 1882, 1883, 1885, March, September, December, 1886, 1887. 



Revised and extended edition, 1888. 



10 H 



CAMBKIUGE: printed by C. J. clay, M.A. and sons, at the university I'KES.S. 



