Astronomy and esr) 153 
m 
sia, with unweighable traces of chlorine, sulphur, and alumina, For the 
quantitative ara, “of the meteorite, a fragment weighing 4°3767 
grammes was treated with nitro-chlorhydric acid (aqua regia), ‘and after - 
solution of avin iron the whole was evaporated: on approaching dryness 
eet silica separated, showing that the silicate had been pa ally, 
least, decomposed by the acid. ter heating until the silica 
rendered insoluble, it was repeatedly treated with acid and évaporstale 
as to insure the oxydation of all the schreibersite, and finally the solu- 
ble part was taken up with chlorhydric acid, and on dilution separated by 
filtration from the silica and insoluble residue. 
The insoluble residue, containing free silica and undecomposed silicate, 
was perfectly white and free from ‘all traces of schreibersite. It wei ghed 
0°1855 grm., equal to 424 per cent of the specimen analyzed. It was 
fused with carbonate of soda, and the silica and bases determined in the 
usual manner, v8 contained 0°159 grm. silica; 0°0054 protoxyd of iron, 
with a minute trace of alumina; 0:0028 ime, and 0°0168 magnesia. 
The soluble ris insoluble portions gave in the analysis the following 
percentage composition : 
. 
- 
iy 
: 
] 
; 
. 
th 25 + cat lie. 
oc 55 8 
Considering 
n S08 ot Si a ee eS 79:44 
Nickel oer % 
Cobalt 0-44 O44 
Ps ab ee 0:08 
Phosphorus SS a te VES es kee cea O49 
wes es Wek es "63 
Protoxyd of | 
eae with 2°73 
sees a tree eat soil 0°12 + toxyd of i Pag: f 10°07 
seam 1-16 | pies olivine 
Magnesia.,....... 2-43 J 
Chlorine, 
Sulphur, minute traces traces. 
Chromium ; 
= toned 
Me ne y to deduct 2°12 per cent from the amount of metallic 
| 2°73. per cent of prays of iron), in order to give the 
sete the olivine formula (RO, SiO,). Admitting this to be the cor- 
_ Tect view, the mass analyzed ‘oitaion 10°07 per cent of olivine, and by 
_ the addition of oan of the protoxyd of iron the analysis adds up 
99°69 instead of 
com eon a this meteorite corresponds very closely with an- 
phe meteoric iron from Tucson, discovered by Mr. Bartlett, and described 
by Prof. J. Lawrence Smith, in the Am. Journ, of Science, 2d ser., vol. xix, 
oe 161. Yor, Smith’s analysis gives iron 85°54, nickel 8 ‘55, cobalt 
61, copper 0-03, phosphorus 0°12, chromic oxyd 0:21, magnesia 2-04, 
* silica 3°02, alumina trace, 100-18. He considers it to correspond to 
_ Nickeliferous iron 93°81, chrome iron 0°41, schreibersite 0°84, olivine 5-06 
- =100-1: By an evident inadvertence, Dr. Smith ae the magnesia 
AM. Jour. Scr. —SEconD xirns, Vou. XXXVI, No. 106.—Jvty, 1863. 
20 
Be ia ces eB ig 3 4 z 
