Paraffins
Peat
Pecopteris
Pennsylvanian anthracite
Persian fire-worshippers
Pitch
Plumbago
Polyzoa
Prejudice against aniline dyes
Prohibitions of the use of coal
Proportions of explosive mixtures
Psaronius
“Purifiers”
Pyrites in coal

Q.

Quantity of coal raised in Great Britain

R.

Reptiles of the coal-era
Resemblance of American and British coal-flora
Retorts
Roman use of coal
Rosanilines, the
Royal Commission of 1866

S.

Sandstone, how formed
Shales
Sigillaria
South American coals
Spores of lepidodrendron
Spores, resinous matter in
Spores, inflammability of
Steel-mill
Sternbergia
Stigmaria
Subsidence throughout coal-era
Surturbrand at Brighton
Sussex iron-works

T.

Tar
Testing pits by the candle
Texas coal
Toluene, discovery of
Torbanehill mineral
Trappers

U.

Underclays
Uses to which coal is put

V.

Vaseline
Vegetation of the coal age
Ventilation of coal-pits

W.

“Washers”
Waste of fuel
Wealden lignite
Westphalian coal-field

Y.

Young’s Paraffin Oil

Z.

Zoroastrians