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AMERICAN JOURNAL 4 
SCIENCE AND ARTS. 
CONDUCTED BY 
Proressors B. SILLIMAN anv B. SILLIMAN, Jr., 
AND 
JAMES D. DANA. 
i pn 
SECOND SERIES. 
VOL. 1X.<{MAY, 1850. 
NEW HAVEN: 
4 
PRINTED FOR THE EDITORS BY B. L 
Printer to Yale College. 
1» HAMLEN, 
md by L. hae big New Haven —Litrrie & Brown, — Fetrringr & Co., Boston.— 
.S. Fra a Grorar P. Putnam, and Jounn Witey, New York —Canpy & 
his Philadel —T. Derr, Pumam’s ioadiien an Agency, 49 Bow La i 
side, London— _ Tor Bossancr & Co., Paris —Nestuer & MELuE, Hemburg 
