620 General Notes. [June, 
ceous shales of Tioga hill, of. protoxide of nitrogen, the exhilar- 
ating gas known as ‘laughing gas,’ with traces, also, of the 
nitrates commonly associated with several of the metals. Asis 
well known, the inhalation of protoxide of nitrogen produces 
exhilaration to intoxication, an irresistible impulse to muscular 
exertion, insensibility to pain, and develops the characteristic pro- 
pensities of the individual to a striking degree. Air is forced 
in the great Sierra tunnel through wooden boxes, and the dis 
tance, leakage and friction being great, the supply was inadequate, 
and hence the accumulation of this nitrous gas at the header, the 
inhalation of which had the characteristic effect upon those work- 
ing there as soon as one of them got an overdose. A muscular 
miner was brought out fighting, and it took four men to hold him 
until he returned to consciousness in the open air, A mail cat- 
rier went in and got a dose, and, when brought out, seized a cou- 
ple of bars of iron, lashed them to his feet with wire, leaped over 
the dump and went sailing down the mountain over the snow. 
Tin FROM Norra CAROLINA.—A valuable vein of cassiterit 
has been found at King’s Mountain, a small town pee 
county, N.C. The vein discovered is between four and five 
in thickness, and has been struck in two places. The ore yie 
869.2 pounds of tin per ton of ore. The finest ore in the rial 
tin mines, at Cornwall, yields less than half this per cent of MY 
the ton, and great expectations are therefore aroused conc at 
this new vein. Specimens of the ore, marked “ unkari ti 
on exhibition at the Boston Exposition last an . 
only lately that the place of the vein has been K. pe 
Tin occurs sparingly at many other places in the 
-` but has never been worked with profit. 
SwEDISH MINERALS.— Mangan-brucite.—L. J browns 
scribes some small grains of a honey-yellow oF absberg mii 
color which occur in the hausmannite ore at oi pa and arè 
in Wermland, Sweden. They are devoid of cle the outside. 
Analysis gave : 
MgO MnO H,O 
57.81 14.16 28.00 
The formula (Mg, Mn) [HO '; is given, and í 
brucite proposed. Apparently, however, it 1$ 
prodúct. ; t 
Talc-triplite—The same author finds in the peat amorphous 
i llowish-red transluc - sorals, P? 
berg certain small yellow or ye I wh other min 
grains which, although intimately mixed wit 
99-97 
Mange" 
the "E alteration 
1 Oefvers. af Kgl. Vet. Akad. Férhandl., 1882, pp. 83-9! 
, Igelström è 
eag 
