462 J. L. Smith—Emmet County Meteorite. 
tions varying very much with different fragments, and ranging 
from 16 to 60 per cent for the soluble part. This soluble part 
consists of silica, ferrous oxide and magnesia, and without a 
trace of lime, thus indicating the absence of anorthite. 
(1) Insoluble portion.—The insoluble portion was carefully 
analyzed by fusion with carbonate of soda, and found to con- - 
tain: 
Oxygen ratio. 
OO ere ae ge oa fo a ee 29°12 
Perrous Galae . 2) ee a ee 4°67 
urns Ult0e e trace 
Ween ee ee ee a EO 9°80 
Soda with traces of potash and lithia_ -09 023 
Puan Fo oe as 9 SP rps oh ae 013 
es 
99°29 
e oxygen ratio clearly indicates the mineral to be Si, 
being virtually Si(Mg¥e), or the common form of bronzile con- 
tained in meteorites. 
(2) Soluble portion.—On testing the green mineral already 
referred to I found that this was the soluble portion, and it was 
readily detected ina pure state from the stony part of the 
meteorite. Its cleavage in one direction is very perfect; 1ts 
specific gravity 3°35; hardness almost 7; pulverized, it 1s 
readily and completely decomposed by hydrochloric acid. 
Two analyses were made, one by decomposing it directly with 
hydrochloric acid ever a water bath, and the other by first 
fusing it with carbonate of soda—the two analyses agreeing 
perfectly. 
Oxygen ratio. 
PAU Sona ee a ee ee Ge 41°50 22°13 
Ferrous oxide ...._....... as 14°21 3°12 
Magee’ 00. So ee 44°64 17°86 
100°35 
The above analysis gives the formula Sik, or that of olivine. 
(8) Opalescent silicate.—In some parts of this meteorite, a 
ing a notable projection on the surface. Although I had a 
5 
mineral to establish positively its true character, but I hope te 
obtain more. An analysis was made with about 100 milligrams 
of the pure mineral with the following result : 
~ 
