‘ 
T. 8. Hunt on Euphotide and Saussurite. 347 
parenuty 
crystalline schists of the Shickshock mountains in Gaspé, 
as somewhat the aspect of saussurite. Its hardness is 7-0 
xygen 
ce sks avs 62°00 i 2.556 33°38 
Alumina,..... 12°90 ci.ssc5 18 
un OF Wn Sits. cir eee A bi eC 2°82 
Rei vas'vcivs ‘ ee. 4:03 
a gain dnd es xc be a. 8 
@ with a trace of potash, .... ‘eee ‘ll 
Loss on ignition,. .. .. "16 : 
9-71 
The oxygen of the protoxyds and peroxyds in the above 
imalysis equals 4-43 and 8-60. If to these we add the silica 
corresponding to 13:00 of oxygen, we shall have 61:33 parts of 
tpdote, lea ing 82°22 parts of silica uncombined. The density 
the mass is that of a mixture of epidote and quartz in the 
Ye Proportions, and in some specimens where the rock be- 
S: gtanular, the two species are easily distinguishable. (Geol. 
Yo Canada, Report, 1858). This epidote rock then is com- 
pletely distinct from the saussurite of Orezza. : 
ei WO silicates zoisite and meionite offer a remarkable in- 
= ae that isomerism in mineral species upon whose import- 
to the have long insisted. The relation of the specific gravity 
‘mpirical equivalent weights of minerals, must enter as 
; Stavity must be the chief guide.—(Proc. Am. Assoc. 
a Ee 1854, pp. 240-247). | 
. of gamet is lessen i hile that of idocrase is reduced 
tei 0294. “Bpidote ‘i aoe a Wa dnote rom 8-40 to 3-20 
Prt Rammelsberg, and éaussurite is eonverted by ene into a soft glass of 
: and garnet crystallize after fusion, the latter according tc 
. Deville found the density of hornblende and pyroxene to 
fusion from 3:2 to 2°8, orthoelase from 2°56 to 235, and labradorite 
025, 
ea £; 
ii ge 
fa 299 
