Intelligence and Miscellanies.— Domestic. 187 
2. Massive yellow Oxid of Tungsten.—On page 52 of 
the present volume and number, we have already mention- 
ed ayellow pulverulent oxid of Tungsten, which occurs, 
as an incrustation, upon the ferruginous and manganesian oxid 
of that metal (wolfram) found in Mr. Lane’s mine at Hunt- 
ingten. We have now discovered the massive yellow oxid 
of Tungsten among some specimens brought us for exami- 
nation by Mr. Lane. 
The colour of this mineral varies, from crange yellow, 
and chrome yellow, to yellowish grey ; it is brittle, fracture 
between conchoidal and small foliated, lustre adamantine ; 
it has very much the appearance of broken sulphur or of 
broken massive carbonat of Jead; it is without smell or 
taste, is infusible and unalterable by the blow-pipe; specific 
gravity of the purer specimens6. water being 1. insoluble in 
acids, but by digestion in nitric acid, the powder, which is 
greyish, assumes a very brilliant yellow colour, and would 
probably afford a fine pigment. 
It is readily soluble in warm liquid ammonia, and is pre- 
cipitated white by acids; the precipitate, by standing, re-ac- 
quires the yellow colour. 
The gangue is quartz, and minute veins of this substance 
and of what appears to be the ferruginous tungsten are dis- 
seminated through some of the masses ; the specific gravity 
of the impure specimens falls between 5. and 6. We have 
one specimen engaged in quartz and much broken, which, 
(we say it however without laying much emphasis upon the 
impression,) appears to be part of a crystal ; we conjec- 
ture anoctahedron ; this fragment is about one inch in 
diameter. 
We understand from Mr. Lane that this mineral is found 
in tolerable abundance in his mine. 
REMARK. 
After digesting acids upen the powder of this oxid of 
tungsten, we examined the liquid for lime, but, without 
discovering any; at present therefore, we do not see that it 
ought to be confounded with the calcareous tungsten, which 
indeed appears very differently : A more accurate examina- 
tion than we have been able to make would be necessary in 
order to decide whether the tungsten is in this case com- 
