replaced by serpentine, had taken place upon the older masses, 
filling up their interstices. 
D 
The paper of Dr. Hunt contains numerous analyses of the 
various minerals noticed above. We extract bis account of the 
POE se i iis oe 
<i 
result 111, which i 
msley, 
related to chlorite 
last are dis nished from it 
us. 
_“ When 
ay SReG RE 2 ere ee 
a a ae eg we . . 
te 
examined under th 
laces the Kozotn of Burgess, s 
98°51 
chlorite and to pyrosclerite in com 
tingu by their eminen 
ote 
hows 
On Eozoin Canadense. 
100-00 
der the name of loganite, and which occurs at the Calne 
dark brown prismatic crystals. I have since observed a simular 
Mineral in two other localities besides the one here noticed. 
Specific gravity of 2°539. These hydrous alumino-magnesian 
‘cates, which I have included un 
 % 
e microscope, the loganite whicl 
) ec of cleavage-lines, 
a 
99°66 
ee ee 
