1817.] during the Year 1816. 73 
Oiridd offs tite och3 ew taraed mits see 93°6 
Oxide of: tantalumiyes). i... ee be Rie tie Ooh 
Oxide of irdne cheeks = 8 SR 1°4 
Oxide of manganese ........... «35 Rees 
98°2 
(3.) Tantalite-—Darker grains were occasionally found imbedded 
in the quartz, which, when reduced before the blow-pipe, yielded a 
smaller proportion of tin. They were at first taken for tin-stone ; 
but after the discovery of tantalite at Broddbo, they were more 
closely examined, and found to consist of a mixture of tin-stone 
and tantalite. One variety being analyzed, gave 
Oxide of tantalum ...... ae ata -» 66°99 
Pekile COUN, veh c ss eee gas segee set LOO 
MORSE) WON hoe wn 20/4) spas clo nie met Oe 
Oxide of manganese ..... sane clefaer, CCS 
DAMS 5 iiss oso Ob aise Wis wine edie bie PAO 
101°79 
Berzelius considers it as a compound of 
PUTING ooo 's oe acca sis anys MasiBE te GIO uD 
‘antalate of lime’ ~.;..:....- Ai anes? fi Ail Ua 
EEO Gp it Apr RBA beat ala perros bats! 
100°0 
Another variety gave, 
OOxInelOn tantaluDls vcs es che oes eels Le er 
Cries Of Unies case APP ira hs Pei Pests tooo 
SPs OE REIN omg wale b<. cache socal ora Deore 
Dine of manganese! i)... ee 122 
POE on don civ dapesn te de Gado ae ae 1°40 
100°67 
According to Berzelius, it consists of 
UH BIOS | ane 5 hid « ai0r0 ays 3.4 eaten ae 4400/8528 
LTO Ce EC eer pe ee eee 14°7 
100°0 
(4.) Emerald, or rather Pseudo-emerald.—This mineral is found 
in regular six-sided prisms, from one to three inches in diameter. 
The colour varies from dark green to yellow green, Fracture un- 
even, and either dull, or having a weak resinous lustre. ‘Trans- 
Jucent on the edges. Easily scratched with a knife. Sp. gr. 2°701. 
From the guantity of glucina which it contains, Berzelius considers 
it as consisting of 
PANGTOHM es seeded een <a ie an 80 
Tale ov ee eewne 2.6 8 6.6.6 BB. 058 66'S. 8.0% 0: 8 8 2 of 41 
100 
(5.) Slaty Tale.—Colour varying from grey green to brown green. 
Found in amorphous masses. Fragments rhomboidal. Fracture 
