we 
& 
» 264 Professor Dewey on Caricegraphy. 
the eye, might in process of time, (to which we are not 
authorized to set any limits,) form a complete greenstone, 
the lava imitating the hornblende and depositions in the 
pores, the feidspar, which would account for the frequent 
presence of greenstone trap as it is called, in the new 
floetz trap of Werner; this rock I should bé disposed to 
cail ancient lava. . iti 
Some of our young geologists fascinated perhaps by the 
brilliant wake of some Europeans, appear willing to ex- 
plode the received artificial divisions : though no advocate 
for the infallibility of stratification, formations &c. &c. &e., 
yet itis probable, that some such arrangement is neces- 
sary, to facilitate the acquisition of the science, like the 
shelves of a library, and perhaps it is equally convenient to 
work with the old, until practice and observation shall 
supply us with a newer and better, 
BOTANY. 
‘ et . 
Arr. [X.—Caricography ; by Proressor C. Dewet, 
sae Williams College. 
in Rees’ Cyclopedia, art. Carex, 172 species; and in the 
elaborate work of C. Schkuhr, about 220 species, and of 
Species in 
