340 Analysis of the Braunau Meteorite. 
hydrate of the oxyd of nickel when edulcorated, dried and expos- 
ed to a red heat, amounted in the whole quantity of material 
operated on, (5°16 grammes,) to 0°364. Since upon its re-solu- 
tion in hydrochloric acid, chlorine was disengaged, and also a 
yellow precipitate formed upon the addition of nitrite of potash 
to that solution, the oxyd of nickel contained cobalt. 
It was therefore again dissolved in hydrochloric acid and nitrite 
of potash in excess added to the solution, the precipitate formed 
thereby—a double-salt consisting of nitrite of potash and oxyd 
of cobalt—removed by filtration, and the liquor passing through 
mixed with caustic potash, upon which a precipitate was formed, 
the weight of which, when dried and exposed to a red heat, was 
‘329 gramme,* equal to 02589 nickel. From the yellow cobal- 
tic precipitate was obtained 0-0348 gramme oxyd of cobalt, cor- 
responding to 0°0273 cobalt. i ; 
2. Treatynent with hydrochloric Acid —2 grammes were di- 
gested with*an excess of moderately diluted hydrochloric acid 
without the application of heat until no further action was 0 
served, There remained but a few black flocculent particles 
which, by pouring off the solution with precaution, were ultimately 
placed upon a piece of platinum foil, where they were well dried 
and then made red-hot. Upon the foil becoming red, a transient 
limmer was noticed, indicative of carbon, while an extremely 
inconsiderable grey residue (silica) was left upon the foil. 
The hydrochloric solution was impregnated with sulphureted 
hydrogen and allowed to stand, loosely covered. in a warm place 
for twenty-four hours. By this time an insignificant quantity of 
a dirty brownish white precipitate had collected on the bottom of 
e vessel. The clear supernatant fluid was poured off, the pre- 
cipitate collected upon a filter and well washed with a solution of 
sulphureted hydrogen slightly acidulated with hydrochloric acid, 
and finally treated upon the filter itself with sulph-hydrate of 
ammonia, whereby it became dissolved with the exception of a 
* Upon our recognizing the presence of cobalt by the disengagement of chlorine 
upon the solution in hydrochloric acid, and being about to proceed to the se 
tag heat and the residue to be dissolved in water to which some ammoni 
een added. 
The cobalt then remains undissolved in the form of a yellow pow- 
ans ssolved in of this double-slt 
der. With regard to the details of this separation, the nature 
Ci a - 
