from the lake Longban. It seems, as far as I could learn, to be situated
in a limestone rock. The minerals which it contains are the
following:
White glittering limestone, containing iron and manganese.
Whitish grey limestone, mixed with yellow and green serpentine.
Globular fibrous limestone.
White fibrous gypsum, in thin layers.
White brown spar, in round balls.
Serpentine,
Mountain cork, and mountain leather.
White clay.
Black massive hornblende.
Dark red, and reddish brown, iron flint.
Crystallized acanticone (pistazite).
Greenish malacolite (sahlitej. I t has an obscure foliated fracture.
Cross fracture small, splintery. Translucent on the edges. Scratches
glass. Specific gravity 3'2g. Before the blow-pipe froths and melts
to a grey bead. With borax it melts into a colourless glass. It contains
more than half its weight of silica. The remaining constituents
are lime, magnesia, and some manganese and iron. Such are the
description and constituents of this mineral, as drawn up by Hisinger.
I have not myself had an opportunity of seeing any specimens of
sahlite from this mine, and therefore do not know how far it differs
from the specimens of the same mineral that occur in the lead mine of
Sala.
Dark red garnets with channelled sides, Which yield 15 per cent, of
iron. Likewise garnets of a wax yellow colour, which yield 21 per
cent, of iron.
A mineral considered as garnet, containing manganese. Its colour
is reddish brown, and in thin plates it is brownish yellow. It occurs
massive. Both internally and externally its lustre is shining, passing
into splendent. Fracture uneven, fine granular, passing into splintery.
Fragments indeterminate, sharp edged. Translucent on the edges. .
Hard; scratches glass, but not quartz. Strikes fire with steel. Specific
gravity 4-136. Melts before the blow-pipe into a black opaque
bead. Its constituents, according to the analysis o f Link, are as
follows:
Silica....................................... 33
Carbonate o f lime. ........................... 34
Oxide o f iro n ................... 17
Oxide of manganese containing iron 10
Volatile ma tter...................................... 4
Loss................................................. 2
100
Petroleum.
Glance coal.
Red ore o f manganese. Its colour is rose red. Fracture foliated,
with three cleavages constituting a rhomboid. Lustre splendent.
Translucent on the edges. Gives fire with steel, and scratches glass.
Specific gravity 3-5384. Before the blow-pipe its colour at first becomes
darker, and at last melts into a reddish brown bead. With
borax it at first effervesces, and at last fuses. Its constituents, according
to the analysis o f Berzelius, are as follows:
Black oxide o f manganese. . . , , . 52-6o
S ilic a ................................................. 39-60
Gxide o f iron............................. 4-60
.... V50
Volatile matter.......................... 2.75
101-05
Crystallized pyrites (the cubo dodecahedre o f Haiiy).
Micaceous iron ore.
Specular iron ore mixed with magnetic ironstone.
Specular iron ore in flat many-sided crystals, similar in form to those
in the iron ore from Elba. It is attracted by the magnet.
3 c 2