ft Fire can be most reliably prevented by
Employing little or no Combustible Material in the Construction of the
Shaft; (2) Precautions for Rapidly Localising an Outbreak of Fire in
the Shaft; (3) Precautions to be Adopted in case those under 1 and 2
Fail or Prove Inefficient. Precautions against Spontaneous Ignition of
Coal. Precautions for Preventing Explosions of Fire-damp and Coal
Dust. Employment of Electricity in Mining, particularly in Fiery Pits.
Experiments on the Ignition of Fire-damp Mixtures and Clouds of Coal
Dust by Electricity -- #Indications of an Existing or Incipient Fire --
Appliances for Working in Irrespirable Gases#: Respiratory Apparatus;
Apparatus with Air Supply Pipes; Reservoir Apparatus; Oxygen Apparatus
-- #Extinguishing Pit Fires#: (_a_) Chemical Means; (_b_) Extinction
with Water. Dragging down the Burning Masses and Packing with Clay;
(_c_) Insulating the Seat of the Fire by Dams. Dam Building. Analyses
of Fire Gases. Isolating the Seat of a Fire with Dams: Working in
Irrespirable Gases ("Gas-diving"): Air-Lock Work. Complete Isolation
of the Pit. Flooding a Burning Section isolated by means of Dams.
Wooden Dams: Masonry Dams. Examples of Cylindrical and Dome-shaped
Dams. Dam Doors: Flooding the Whole Pit -- #Rescue Stations#: (_a_)
Stations above Ground; (_b_) Underground Rescue Stations --
#Spontaneous Ignition of Coal in Bulk# -- Index.

#VENTILATION IN MINES.# By Robert WABNER, Mining Engineer. Translated
from the German. Royal 8vo. Thirty Plates and Twenty-two
Illustrations. 240 pp. Price 10s. 6d. net. (Post free, 11s. home; 11s.
3d. abroad.)

#Contents.#

#The Causes of the Contamination of Pit Air -- The Means of Preventing
the Dangers resulting from the Contamination of Pit Air -- Calculating
the Volume of Ventilating Current necessary to free Pit Air from
Contamination -- Determination of the Resistance Opposed to the
Passage of Air through the Pit -- Laws of Resistance and Formulae
therefor -- Fluctuations in the Temperament or Specific Resistance of
a Pit -- Means for Providing a Ventilating Current in the Pit --
Mechanical Ventilation -- Ventilators and Fans -- Determining the
Theoretical, Initial, and True (Effective) Depression of the
Centrifugal Fan -- New Types of Centrifugal Fan of Small Diameter and
High Working Speed -- Utilising the Ventilating Current to the utmost
Advantage and distributing the same through the Workings --
Artificially retarding the Ventilating