Gas, coal
Gasholder, the
Gas, house, constituents of
Glossopteris
Graphite
"Green Grease"
H.
Hannay, of Glasgow
Heavy oils
Humboldt's safety-lamp
Hydraulic Main
I.
Impurities in house-gas
Indian coals
Insertion of rootlets of stigmaria
Insufficiency of modern forest growths
Ireland denuded of coal-beds
Iron, supplies of
L.
Lepidodendra Lepidostrobi Lignite London lit by gas
M.
Mammoth trees
Marco Polo
Marsh gas
Medium oils
Metamorphism of coal by igneous agency
Methods of ventilation
Mountain limestone
Murdock's use of gas
Mussel beds