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270 Scientific Intelligence. . 
Fuses very readily before _ abiomp ive 3 in the platinum ee with a 
brilliant yellow light and a strong intumescence. Affords a colorless 
transparent glass with borax. Dissolves readily in a = quantity of 
soda; but with more soda, swells to an infusible slag. ‘The analysis 
gave silica 46:12, alumina and a little peroxyd of iron 25:91, lime 27:08, 
soda 0-85 = 99-91, from which comes the formula Ca? Si- Al Si. 
(2. ) Chlorastrolite. This mineral occurs in finely radiated stellated — 
masses, having a pearly lustre, and slightly chatoyant on the rounded 
sides. H.—55—6. G.=3180. Color light bluish green. Fuses 
éasily before the blowpipe to a. grayish blebby | glass, bch tat and 
swelling up is a zeolite. In an open tube it gives off w and whi- 
tens. Soda ssolves it in small quantity, and gives a bead F eoldtee by 
adrace of nang with more of the as may swells to an infusible 
slag. ye ae best with” borax, affording a transparent glass col- 
ored by ir ves a beautiful blue, with nitrate of cobalt. Dissolves 
readily aii "sods a rel precipitate with muriatic acid. The analy- 
ac gave silica 36-99 » perox xyd of iron and a little pro- 
toxyd 6-48, linie 19°50, soda ‘3-70, petach 0:40, water 7:22 = 100-18. 
The following formula i is deduced ro a Na 8} 2( A Fe)Si-+ 3: 
it is that of meionite, ergncers the w 
rin Upper California, Pseresapeneea ni this 
March 24, 1848.)—The mine of New Aipunadion i is situated a few sai 
from the coast, about midway between*San Francisco and Monterey, 
and in one of the-ridges of Sierra Azuh mountain. The mouth of the 
mine is a few yards down: from the summit of the highest hill that has 
boring plain, and not much more above the ocean. ‘This hill ex- 
tends longitudinally in a northwesterly direction, decreasing in height ; 
and in various par pare for several miles, traces of the ore have been 
ad, and some, open gs have been made which promise to be valua- 
not yet had an opportunity properly to study. The prevailing one is a 
talcose rock, which seems to embrace the bed of ore at the 
, mine both above and — _Asspecimen from the 
rock. immediately contiguous to the ore, is contained in the box. The 
gh a yellow | ochreous matrix, which forms @ 
r fe 3, y at an angle of about 45°. 
~The richest ore, is-at present found im the upper abe the bed, the 
poorer ores being taken from the lower portion. 
This mine, known t the aborigines,from time immemorial as a * cave 
of red earth,” from which they obtained paint for their bodies, was first 
discovered to contain quicksilver aboutefour years since, during experi- 
ments made by some Meéxicans:to smelt the ore for the purpose of ob- 
taining gold, which they supposed it to contain, . About two years ago 
it fell tie the hands of Barron, Forbes & Co., who sent on hands, tools 
and funds to commence working it, it. Unfortunately thevessel fell into 
the hands of the United States forces, and was SPalpcatishe 5 ~ opera- 
tions of the mine were of course delayed till the arrival of M 
himself a few satin since, with miners, tools, and whatever things he 
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