Notice of Hayden's Geological Essays. 4 
Arr. V.—WNotice of “Geological Essays, or an inquiry into 
some of the Geological Phenomena, to be found in various 
“parts of America and elsewhere—by Horace H. Hay- 
DEN, Esq. member of the American Geological Society,” 
 &e. &e. oe ; Pes es ae 
an authority, 
in P or ¢ 
ry work, on Mineralogy and G 
, we leave these 
e object 
a Be 
r 
erner, itis well 
he primitive, the 
known that the three le ling fi 
