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Art. XXIII. — Miner alogical Description of some Aerolites 
which fell near Wiborg , in Finland. By Nils Norden- 
skiold, Esq. M. G. S. 
In the Algemeine Nordische Annalen der Chemie of Scheerer, 
Fart I. p. 174, there is given a short account of the circum- 
stances connected with the fall of certain meteoric stones, on the 
13th December 1882, near Loutolox, a village in the parish of 
Savitaipal, in the Government of Wiborg, in Finland. A short 
mineralogical description of these substances may perhaps be of 
some interest, even without a complete chemical analysis, more 
especially as I am not aware that any meteoric bodies of this 
nature have hitherto been observed to fall in so high a latitude. 
In external appearance, they have more resemblance to lava 
than to any other stone I have had occasion to see. The sur- 
face, as usual, is covered with a black shining crust, but, when 
broken, it presents the appearance of an aggregation of volcanic 
ashes, and it is so friable as to be easily reduced to powder by 
the fingers. The following ingredients can be very easily dis-^, 
tinguished in it. 
!<$£, A greenish transparent mineral, which looks as if it had 
been melted, and under the blowpipe exhibits the same pheno- 
mena as olivine. The largest globules of it are not greater than 
a pin’s head. 
Qdly, A white semitransparent mineral, which has often a 
crystalline appearance on the surface, and which exhibits no 
marks of fusion when inspected with the microscope. It is so 
very friable that it is difficult to get a bit of it for examination. 
By itself it is quite infusible, and under the blowpipe still re- 
tains its translucency. With soda, it gives only a scoria, which 
is very difficult to fuse ; with borax, it melts with difficulty into 
a clear and colourless glass ; with salt of phosphorus it unites 
with still more difficulty, and the globule turns opake on cool- 
ing ; solution of cobalt gives it a blue colour, but it does not fuse. 
These experiments, it must be confessed, are not altogether 
sufficient to determine with certainty its precise nature; but 
under this treatment it exhibits exactly the same phenomena as 
leucite, which mineral it closely resembles in external aspect. 
