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First Printed 1875. Printed and Stereotyped 1876. 



Reprinted March- and Jtily 1877, February and December 1879, 1881, 

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



Revised and extended edition, 1888. 



10 



CAMBRIDGE: PRINTED BY c. j. CLAY, M.A. AND SONS, AT THE UNIVERSITY PRESS. 



