10 Notice of Prof. Clark’s Thesis on Metailic Meteorites. 
ored by manganese, was then digested in water, and the colorless 
fluid filtered from the metallic oxyds. This was tested in the 
usual way with a solution of magnesia and with molybdate of 
ammouia, and found to contain “phosphoric acid. The oxyds 
were dissolved in hydrochloric acid, and the iron precipitated by 
ammonia. The filtrate was treated with hydrosulphuret of am- 
monia, which threw down a black sulphuret, insoluble in dilute 
hydrochloric acid. ‘The quantity was too small for nearer exam- + 
ination. The plates which appear to produce the figures in this 
meteorite are therefore in all probability, the phosphuret of iron 
and nickel, though present in small quantity and very uneqnally 
disseminated through the mass. A number of brownish particles, 
harder than glass, and resembling the granular chrysolite of the 
Atacama iron, were also observed in the insoluble residue. The 
solution filtered from the insoluble portion was saturated with 
sulphuretted hydrogen gas, and the light brown precipitate formed 
was collected on a filter, washed, roasted and weighed. It was 
then reduced with soda before the blowpipe, and yielded a mal- 
leable globule of a reddish white color, containing copper and 
tin. The sour solution, filtered from the sulphurets, was boiled 
to expel the excess of sulphuretted hydrogen, and the iron oxyd- 
ized with chlorine gas and precipitated by means of succinate of 
ammonia. After weighing, the oxyd of iron was fused with car- 
bonate of soda and found to contain phosphoric acid and silica. 
The filtrate from the iron was concentrated by evaporation, and 
treated with a slight excess of sulphuret of hydrogen and ammo- 
nia, by which a few milligrams of the sulphurets of co 
nickel were precipitated. After the fluid became clear ad color- 
less, it was filtered, and the sulphurets roasted and weighed. 
Tested before the blowpipe, the oxyds obtained appeared to con- 
tain much more cobalt than nickel. The solution filtered from 
the sulphurets was evaporated to dryness, the ammoniacal salts 
driven off, and a small quantity of magnesia thus detected. 
8. Bitbure, in the Eifel. Found in 1805. Described by Col. 
Gibbs. Weight 3300 to 3400 lbs. This enormous mass was dis- 
covered in repairing a road and was heated and hammered at an 
iron furnace with the exception of a few ounces. It contains a 
light green olivenoid substance in eas quantity, irregularly scat- 
8 
tered through its mass. Sp. gr.= 6:52, Rumler. Analyanets 
a Jobn. 
Tron, - - 818 - 78°32 
Nickel, - a SS “ri «g 1 
Cobalt, - - * 1:0 - 3°00 
Manganese, - - 0-2 
ilicon, - - - 0:05 
; - - - - § 660" 
Sulphur, oe ee es ee 
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