THE /./ 3 



AMERICAN JOURNAL 



SCIENCE AND ARTS. 



JAMES D. DANA, B. SILLTMAN, and E. S. DANA. 



Pressors ASA GRAY, WOLCOTT GIBBS and 



E. C. PICKERING, of Cambkidge, 



Pkofessoks H. A. NEWTON, S. W. JOHNSON, 



GEO. J. BRUSH and A. E. VERRILL, 



OF NEW HAVEN. 



THIRD SERIES. 



VOL. XIII. -(WHOLE NUMBER, CXIII.1 



Nos. 73-78. 

 JANUARY TO JUNE, 1877. 



NEW HAVEN: EDITORS. 



1877. 



