116 ~ Scientific Intelligence. 
or 1-72 per cent of soda, while we have 35°69 per cent of ceesia in the 
mineral. Plattner’s analysis would then read: 
Si * 3 Na H 
46 20 16°39 0-86 35°69 1-72 2°32 = 10318 
Oxygen, 24°64 766 02 202 O44 2-06 
corresponding in all, except the soda, very closely with the results ob- 
tained by Pisani. The excess in both Pisani’s and Plattner’s anal 
would seem to indicate that a portion of the alkalies in the mineral were 
more than traces of potash’in the cxsium salt obtained in bis analysis. 
Ww 
sulphuric acid, and 6 ¢.c. of water in a closed tube of Bohemian glass, at 
a temperature of 220°-240°C., it is completely decomposed. In this 
manner he has been enabled to determine with accuracy the amount of 
protoxyd of iron contained in tourmaline and other minerals, Six speci- 
mens of tourmaline, the same as analyzed by Rammelsberg, were found to 
stance, Hermann’s supposition that carbonic acid is one of the constituents 
of tourmaline, is incorrect. Mitscherlich also decomposed several speci- 
C. F. Rammetssere.—l. Kobellite—-This species occurs at Hvena, in 
Sweden, associated with actinolite, chalcopyrite, and small reddish white 
erystals of a cobaltiferous mispickel (Kobaltarsenikkies). Kobellite re- 
sembles antimony-glance in general appearance; G.—6°145 The analy- 
sis was made by decomposing the mineral with chlorine. It was impos- 
sible to get the mineral entirely free from the associated arsenical and 
Copper pyrites. Composition : ) 
a ee ee ee 0 Ce Ce . 
ed (1822 1860 946 256 4425 381 127 0689885 
Sulphur combined, «430 379 164 685 218 0°32 036 = 1944 
Especial care was taken to ascertain the absolute purity of the bismuth 
