on platinum foil. Is slowly consumed leaving more or less ash,
principally Fe^{2}O^{3}.

* * * * *

Mineral. Anthracite

Formula. C + x[.H]

Behavior

in glass-bulb. Evolves water.

on platinum foil. Is slowly consumed with the exception of a small
quantity of ash.

* * * * *

Mineral. Wallsend-coal

Formula. C, H, O, S and ash.

Behavior

in glass-bulb. Intumesces and gives off water and tarry matters
which partly condense in bulb, and leave a
porous coke.

on platinum foil. Takes fire under blowpipe flame, and burns with
a smoky flame, depositing much soot and leaving
a porous cinder which burns slowly and leaves a
small ash.

* * * * *

Mineral. Cannel-coal

Formula. C, H, N, O, S and ash.

Behavior

in glass-bulb. As the preceding but gives off more tar.

on platinum foil. Similar to the preceding. If held to the
lamp-flame, takes fire and burns for some
seconds.

* * * * *

Mineral. Brown-coal

Formula. C, H, N, O, S, and ash.

Behavior

in glass-bulb. Gives off much water and tar, and leaves a
porous cinder retaining the form of the original
fragment.

on platinum foil. Burns slowly and without flame, leaving some
ash.

* * * * *

Mineral. Asphaltum

Formula. C + H + O.

Behavior

in glass-bulb. Fuses with ease affording an empyreumatic oil
having an alkaline reaction, and combustible
gasses, and leaves a carbonaceous residue,
which is entirely consumed under the blowpipe
flame, except a little ash.

on platinum foil. Takes fire and burns with a bright flame and a
thick smoke.

* * * * *

Mineral. Elate