L. I, Igelstrim on bituminous Gneiss in Sweden. 41 
specific gravity I found to be 1299; after the removal of all 
remaining stony matter, it would probably be about 1-27. 
Analysis by Pe gave the following results: (ash and 
water being rem 
The ssabubesea substance obtained from 
No. 3. No. 2. Medium. 
REDO ses css tee 88°68 88°79 a 88°74 
Hydrogen,........ 5°35 5°56 — 5°46 
Nitrogen... 23% — — 0°67 0°67 
Ox prey i 50% — — — 5°13 
The carbonaceous substance is generally but little affected by 
solvents. Spirit of 90 per cent pure alcohol became yellow and 
dissolved scarcely one per cent* of a substance, probably color- 
less when pure and easily soluble in alcohol ; when heated it 
— a thick white vapor and slowly blackened. ther dis- 
lved 4 per cent of a substance of the same nature but less 
pat Chloroform, like alcohol, was colored deep yellow and 
left a similar residuum, the quantity of which was however not 
determined. il of turpentine had no more dissolving effect 
than alcohol or ether, The experiments with alcohol, ether 
and oil of turpentine, were performed by boiling the substance 
in the solvents for several hours. 
warm solution of 1 part of caustic potash in 6 parts of 
water dissolved 5 per cent and became black-brown. From 
this solution by the action of acids was obtained a very volu- 
minous brown precipitate soluble in pure water. After the 
extraction of this 5 per cent, the remainder was unalterable in 
a heated golution of caustic potash, though aE for several — 
hours to its action. 
’ small seale, the ‘pd nce 0: asthe as a as ible avoi- 
= Thee er se ems 
m of the substance gave, rapidly —_ om c. ¢. of 
ene of 93° C., collected and measured over wa e gas, a 
when full: fully purified from varbonie acid, T found 57 vol peas 
bjdvenabons absorbable we bromine: Pe another experiment, — 
Ln, aah i, 
* Th, 2 Ea Lf. 
