Yol. VII. 



MA 



1819. 





Published the first day of every second month, price $5 per year, 





THE 



AMERICAN JOURNAL 



OF 



SCIENCE AND ARTS. 



CONDUCTED IT 



Professors B. SILLIMAN and B. SILLIMAN, Jr., 



AND 



JAMES D. DANA 



SECOND SERIES. 





No# 21.— MAY, 1849 



NEW HAVE : 



PRINTED FOR THE EDITORS BY B. L HAMLET, 



Printer to Ya ollege. 



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