3*4 
.METALS* SOS* Coluuibiitiis!* loju Tantaliaiss* 
EOi, COLUMBIUM* Browxufh-black interaaliy 
iron-grcjT, wiria a ckocoiate-brown jftineak 
powder, hardilh, very brittle, of an im,pcrfe<aly 
foliated testture, c^ake^ not .artra/^f d by th^ 
inagnet; fpedik gravity 5,9* 8, 
CoaUMBIUM. 
Colauabke. Than^m chnu 4. f. izj. 
Sent to &r Hans Sloanc froin Jda££dhufeis^ «nd is at preffent 1® 
the Scitilh Muieum: colour ^arj< grcy-l)rovvii with a 
ItiHreJ father hitd, and very brittle i longktidmal frajSfaJt® 
impetifeQly jlaiaeliar, ctofs-fraftBre fine 'grained 2 when cX' 
pofed to a violeat heat far a long itijne was fautid in a 
ihttacSc powder 1 con-tain's, .oxyde lof coimnbaiiHi 7S, 'oxy^ 
I ef iron xa. 
ao2. TANTALIUM, Blasddlli-grey, IbfiiDb, of* 
graamlar frafture, i«yt' magnetic, ii^cife gravity 
€,500; ajot fbloible in any ac-id, oor .altering ^ 
coitmr wiuaa bested to rednelsj meking ■widt 
phoipbate ©f ifoda and borax into a .coIoutIc^ 
glaik 
inwgarsKij- Confikbig of asxyide of saatalitim 'COfiibiHed wiffe the ;®*' 
ydes of afcm .aad iBamgane'fe. 
TansaSle. Tbua^ha cbtm. 4. /. « 27, 
fottfid at Xtauta .ia Fialani^ in irregular cryftalss colcww 
tween ‘hknih-grey 'md ;blacki£h-gicy; furface .finooth with 
anetaTJic iettre : very hard, mot magnetic* firafiBre com-paA ' 
f|)ecific grawity 7^95 3* 
jlKfast**, Coafi-ffijag of oxyde of taajtalium coDahined widi lie ‘®*' 
ydes of iron and yitxia. 
ytirfftantaiite. W^fnrnifonthem. ^ js.jt'S, , 
Found St Kimm in Finland^ in fmall kidney-form malles ^ 
inconfiderable hardnefst fradlare grannJsr, dion grey, ^ 
nvetailcc laftrct may be foatched .with a knife* and gtnei * 
grey powder.: fpeci-fic gravity 5,* 30. 
