ee eee 
Notice of Prof. Clark’s Thesis on Metallic Meteorites. 17 
Iron, - - - - - 87-20 
Nickel, = i “ ‘ 4-24 
Phosphorus, - - - - 7:26 
Carbon, - - . ‘ ? 
98:7 
26. Seelisgen, near Schwiebus in Silesia, Austria. Described 
by Géppert in 1847. Found in ditching a meadow among boul- 
ders of primitive rocks, fourteen feet beneath the top of the 
ground; and was sold for old iron to a blacksmith. Weight 
218 lbs. It was covered with a dark brown crust of oxyds from 
one-fourth to three-fourths of a line in thickness. The indenta- 
tions upon its surface were quite striking. The metal is mallea- 
ble, homogeneous, of a light steel gray color, and contains an 
unusual quantity of a very insoluble pyrites, which is dissemi- 
nated through the mass in irregular veins, in long, cylindrical 
portions, and in minute spherical globules. This pyrites is of a 
grayish brown color, inclining to bronze-yellow, rarely tarnished 
pinchbeck brown or bluish, with a dull metallic lustre. The 
small globules are darker colored and more compact than the rest, 
SO as to be capable of taking a polish. ‘The streak is grayish 
black, and the cleavage, octahedral. Multitudes of zigzag seams 
run through the mass, sometimes forming cells, the surfaces of 
which are scoriaceous and jagged, and coated with an earthy sub- 
Stance of a blackish brown color. These cells also contain nu- 
merous spherical globules of pyrites, and according to, Partsch, 
small isolated masses of metal. Where the cells open on the sur- 
ace of the mass, may be seen numerous arborescent, metallic 
points, and the black earthy mineral is appareutly changed to 
hydrated oxyd of iron. The fracture is lamellar in one direction, 
bnt otherwise grannlar. Etched surfaces appear rough and gran- 
ular, exhibiting only a few short fine, parallel, depressed, lines, 
utno Widmannstattian figures. H.=4, Gr.=7°63-7-73. Gr. of 
pyrites =4-787, Rammelsberg. Analyses: 
Duflos. Rammelsberg. 
Tron, - 90-000 - 92-307 
Nickel, “ 5308 - 6 228 
Cobalt, - 0-434 - 0-667 
Manganese, - 0-912 Tin, ? 
0 i 0°103 - 0-049 
Silicon, - 1:157 - 0-026 
Schreibersite, 0-834 : 183 
Graphite, ‘ Carbon, 0-520 
mium, - ? ? 
98°749 100-000 
Szcoxp Sznims, Vol, XV, No. 43.—Jan, 1853. 3 
