METALS. 99. Titaninm* 
3*1 
VlardiOi, very f^nAcrms, black* conipaa, Aiming mter- 
UrSValpb«ranis. Klapr.t^,^bem, an.aL 1789 a p. 403. 
Pccbblende. Werner Bergman Journ. 1789. I . /. 304. 
Sulpburated laranite. KhnMtn miner. 2. p. 305. 
Sulphurated iiranit. Sehmeifzer mtn. z. p. 275. 
PechWefide. T/xmfen chem.^ p 
Found at Jeihanngeorgenlladt in Saxni^., either formmg entire 
thin ttrati altcr'Ltirg ivith other ftratiiied minerals, or maf- 
fue and difperfed: colour black, dark grey, orblmfli black, 
tvkha dark^ ftreak and opake black powder; texture con- 
Sdal very brittle: imperfeaiy loluble in fulphanc and 
muriatic acids, but pcrfeaiy in nitric 
acids, giving the folution a vinous yellow ; forna^ng a grey 
Se flag with borax and foda, and a green glafs with mi- 
Xofmicfalti Specific gravity 6.378 to 7.S00: contains, 
uranium 86,5; tfdphuret of Iwd 60 : lihca 5,0; oxydc of 
Stan 2»5« Klaproths 
OQ, TITANIUM. Orange-red, very liard, in mi- 
ante agglutinated grains, fpecific gravity — 
not fofibte by any known hear, but when expoled 
hot to the open air forming a blue or purple 
oxydei precipitating a white powder when its 
eryftals or red oxyde are fufed in 4 times their 
weight of potafs, and the whole diflblved m 
water. 
^Jeaatia^ 
etiiA, 
In fmall irregularly Aiaped grams, black, eafily pulverifed 
and the powder attraded by the magnet. 
Menackanite. Kir^an miner, z. p. 326. 
Menaekanite. Crell's annali, ni. p. 252. 
Menackaniie. Tbomjonehem. ^ p. izz. 
Found in the valley of Menackan in Cornwall, w fmall gram* 
rdembline cunpowder of no det’rminate ftiape, and often 
with fine grey fand: it does not detonate with nitre, 
hut melts with t'vo parts of alliah into an oliyc coloured 
mafs, from which nitric acid precipitates a white powoer, 
and this powder mixed with diluted fulphuric acid fo that 
the inids be not too liquid, and evaported to d.ynefs. pto- 
duces a blue mafs: before the blowpipe it does not decre- 
pitate, but with microcofmic fait it acquires a greenilli unge 
