464 Tungstein and Tellurium found in America. 
cold or hot. This is all that I can say of it at present, except 
that it possesses a most horrid smell.‘ It is from this last cha- 
racteristic that Dr. Hayden proposes to call it 2ecronite, from the 
Greek vexgos. 
Dr. Hayden subsequently found in a marble of the same kind, 
but from a different quarry and a few miles distant from the first, 
a quartz almost as fetid as the necronite, and likewise associated 
with small prisms of titanium. ‘* These substances,” he adds, 
“‘ carry with them a degree of interest in another point of view. . 
They seem to invalidate the opinion that the fetid smell of se- 
condary limestone shale, &c. is derived from the decomposition of 
animal matter; as their gangue is decided!y a rock of primitive 
formation. —_——- 
TUNGSTEIN AND TELLURIUM FOUND IN AMERICA. 
It is well known to mineralogists that tungstein is very rare, 
and that telluriam is found only in Transylvania. Both metals 
have been discovered in a bismuth mine in the town of Hunting- 
ton, Connecticut. The tungstein was in the state of yellow oxide, 
and the tellurium in the metallic state. The tungstein is stated 
to be abundant in the mine; it is the ferruginous species known 
to mineralogists by the name of wolfram, Both the tungstein and 
the tellurium are found blended in the same pieces,but whether in 
mere mixture or in chemical combination is not yet quite deter- 
mined. Many specimens of the tungstein exist without the tel- 
lurium, but every piece which has afforded tellurium has also af- 
forded tungstein, and in greater abundance. Even in well-defined 
crystals both metals have been found in the same crystal, and 
where the external appearance was liomogeneous. In other: spe- 
cimens a difference seems to be apparent, and a proper ore of 
tellurium appears to be blended with a proper ore.of tungstein. 
This latter ore is the wolfram composed of oxide of tungstein, 
or, as some choose to say, tungstic oxid combined with iron and 
manganese. The crystals, however, are octahedral; a fact which 
we believe is not mentioned of this species by authors, although 
this form is found in the calcareous tungstein.—_ American Journal 
of Science, No. III. 
ACOUSTIC INSTRUMENT FOR ASCERTAINING THE STATE OF THE 
LUNGS. 
Dr. Laennec lately presented to the FrenchAcademy cf Scienees 
an acoustic instrument, which, according to the Doctor, affords a 
certain means of discovering diseases of the thoracic viscera, and 
particularly phthisis pulmonalis. M. Perey was appointed by 
the Academy to make a special inquiry into ‘the utility of the in- 
strument ; and the report he has made is extremely favourable. 
The little advantage, says the reporter, which has in many cases 
been 
