342 T. S. Hunt on Euphotide and Saussurite. 
de Saussure and Mohs. At length I met with a very heavy 
rock which occurs with the ophiolites of Orford, and closely re- 
sembles an ophitic euphotide. It is made up of a white 
having the aspect of saussurite, intermingled with a small 
amount of a soft green serpentine, which fills the interstices 
between irregular rounded masses of the garnet; portions of the 
latter mineral half an inch in diameter, are easily obtained ina 
state of purity. It is distinguished by a hardness of 7-0, and by 
its density, which for selected fragments, was found to be 3°22 
—3'536. It is amorphous, finely granular, and extremely tens 
cious, with a conchoidal fracture; lustre feeble, waxy; color 
yellowish or greenish-white; sub-translucent. After intense 1g — 
nition, which did not however.effect its fusion, the pulverized 
mineral gelatinized with hydrochloric acid. Its analysis Was — 
made after fusion with carbonate of soda, and gave:— 
eR, es oe. SS°OO Foc cee 38°80 
Alumina, 29°71 
ime, 34°88 
Magnesia, ‘4 
Oxyds of iron and manganese, 1°60 
Soda and a trace of potash, ..........00008- “47 
Loss by ignition,. sf Oy 
99°80 
Croft obté of 
for a white garnet from the Ural mountains, ephees density 
87°15 = 99° 
At the’ falls of the river Guillaume in St. Frangois, (Beane) 
a som ions it has a sub-col 
ewhat variable aspect some porti shining, 
This 
in 
agate; its specific gravity was found to bé 3:333—3" : 
occurs as ‘a greenish-white or grayish-white somewhat eta 
ig’ cavities in which are lined with po indistinct 
the density of this variety was 3°397—3°486. 
_ Other specimens from Tas same. locality exhibit the ee 
intermingled with large cleavable masses of dariegt” cite 
blende, which passes into a pearl-grey or lavendergry 7 ity 
Smal from this mixture had ade) 
of 3496; they were white, opaque, with a conchoidal et and 
é | Intermingled with the garnet /_ 
