THE 
AMERICAN 
JOURNAL OF SCIBNCE, 
we 
AND ARTS. 
CONDUCTED BY 
BENJAMIN SILLIMAN, 
’ PROFESSOR OF CHEMISTRY, MINERALOGY, ETC. IN YALE COLLEGE, CORRES- 
PONDING MEMBER OF THE SOCIETY OF ARTS, MANUFACTURES AND COM- 
MERCE OF LONDON, MEMBER OF THE ROYAL MINERALOGICAT, 
SOCIETY OF DRESDEN, OF THE IMPERIAL AGRICULTURAL 
- SOCIETY OF MOSCOW, AND OF VARIOUS LITERARY 
AND SCIENTIFIC SOCIETIES IN AMERICA, 
VOL. VIII. SemmOe— damm, 1924. 
NEW-HAVEN : 
PRINTED AND PUBLISHED BY S. CONVERSE, FOR THE EDITOR. 
SOLD BY THE PUBLISHER; BY E. LITTELL, 
PHILADELPHIA, AND TRENTON, N.J.; AND 
By Howe & Spalding, New-Haven; Davis & Force, Washington, (D. C.) ; 
Huntington & Hopkins, Hartford ; Cummings & Hilliard, Boston ; Good- 
ale Glazier & Co. Hallowel, Maine; A. T. Goodrich & Co. Neve-York ; 
Caleb Atwater,Circleville, Ohio; Thomas.J. Ray, Augusta,Ga.; Whipple & 
Lawrence, Salem, Mass.; Edward J. Coale, Baltimore; B. D. Plant, 
Columbia, S. C.; Miller & Hutchins, Providence, R.J.; Thomas R. 
Williams, Newport, (R.1.) ; William T. Williams, Savannah, Geo. ; Luke 
Loomis, Pittsburgh, Pa.; Daniel Stone, Brunswick, Me.; Professor D. 
Olmsted, Chapel Hill College, N.C.: John Miller, No, 69, Fleet-street, 
London. 
IWOP 
