T. S. Hunt on Volcanic Action. 23 
, 
gos A ik 
5 
lee 
a>) 
2 
row 
Oo 
i) 
Cas 
ras) 
<x 
oF 
Es 
a) 
fan) 
o. 
s 
5 
ras) 
© 
oar) 
uM 
ra) 
et 
re 
B 
S 
Ez 
ee 
Es 
o 
for 
ao) 
fe) 
Re 
f 
o) 
Bp 
m 
& 
et 
eS 
0 
of the congealed primitive mass, disintegrated and modified 
y chemical and mechanical agencies, impregnated with water, 
and in a state of igneo-aqueous fusion. 
The history of this view forms an interesting chapter in 
geology. As remarked by Humboldt, a notion that voleanie 
to be drawn between Neptunian and volcanic rocks, since they 
gear into each other. Voleanic phenomena, according im, 
eir origi in an igneous fluid center, nor in an 
traversed by an electric current, became a strong magnet when liquid at a tempe- 
rature of .1300° C., and retained its magnetism while cooling (Comptes Rendus de 
V’Acad. des Sciences, Feb., 1869. 
