AMERICAN JOURNAL 



"a 

 n OF 



V SCIENCE AND ARTS. 



'AMES D. DANA, B. SILLIMAN, and E. S. DANA. 



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

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

 OF NEW HAVEN, 

 EDWARD C. PICKERING, op Boston. 



THIRD SERIES. 



\'()L. XI-[WHOLE NUMBKH, CXL] 



JANUARY TO JUNE, 1876. 



W HAVEN: EDITO] 



1876 



