92 J. L. Smith on Meteoric Stones from Danville, Ala. 
which corresponds with the protosulphid of iron, Fe8. 
Whether it contains any of the sulphid known as troilite I am 
not hanks to say. 
e stony minerals were freed as much as possible from iron 
and pyrites, and one gram treated with ten grams of hydro- 
chloric acid on a water bath, and evaporated nearly to dryness, 
then filtered and the filtrate well washed ; ; after which, the res- 
idue in the filter was warmed with a solution of caustic soda to 
dissolve any silica belonging to the portion dissolved by the 
acid ; it was then filtered again and washed. The result was 
Soluble portion, ........ ee ee kes CGn) Sas 60°88 
TWO: DORON Bs F858 FO Se ea re 39°12 
The treatment by a solution of cavstic soda or potash is of 
importance for a correct result, as otherwise a portion of the 
silica of the decomposed minerals will be estimated with the 
portion that is undecomposed. 
The insoluble portion was analyzed ; for although the anal- 
is made in this way cannot furnish any positive indication 
in regard to the true mineral constitution of the meteorite, it 
is, nevertheless, an important guide. It was found to consist of 
RAT ya pene 0 ek es ae oe os ea nc 50°0 
AINA. cere ye Sok cc ee Cova en 4°11 
Protoxyd of iron, ed Sx ea EAD oe ce he «bos 19°85 
Magneme, oo ccs eves Ee wake a a eee 20°14 
HOGS a ee es ee a es 3°90 
am: 98:08 
~ From all the circumstances connected with this mineral, its 
Agta oocaee ss &c., it is doubtless a pyroxene of the au- 
gite var 
The eile portion, owing to the unavoidable presence of a 
little iron and pyrites, simply furnished results on ana gk 
that showed it to be mostly olivine. The only matter, as 4 
whole, freed as much as possible from pyrites and nickels ferous 
iron, ae 
RUGA, Serr ee oe (ood Crees roe er: 45°90 
FPRONYS OF HOR, Fe ees eee Pr ees 23°64 
ci. lpn RES Ce ee ee eee 26°52 
AIA 5 ss ER ST es 1:73 
RRS 5 ee SGA SSE ee 231 
Oia ass aa kns cae iichecsw ewes kar woe “bl 
PORN S veea os oe eee wie Re A CR RS "64 
Oxyd of eo a iumiute ed og estimated. 
or of Chrome 
: hosphorus, “ ss 
Lithin-iathed reason wth the apeossoe. 
Solphur,..-.-..-.s6-0 101 
a8 - 
