RECOVERY WORK AFTER PIT FIRES. By Robert Lamprecht, Mining Engineer and Manager. Translated from the German. Illustrated by Six large Plates, containing Seventy-six Illustrations. 175 pp., demy 8vo. Price 10s. 6d. net. (Post free, 10s. 10d. home; 11s. abroad.)

Contents.

Causes of Pit Fires -- Preventive Regulations: (1) The Outbreak and Rapid Extension of a Shaft 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 FormulÆ 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 Current -- Ventilating Preliminary Workings -- Blind Headings -- Separate Ventilation -- Supervision of Ventilation -- Index.

HAULAGE AND WINDING APPLIANCES USED IN MINES. By Carl Volk. Translated from the German. Royal 8vo. With Six Plates and 148 Illustrations. 150 pp. Price 8s. 6d. net. (Post free, 9s. home; 9s. 3d. abroad.)

Contents.

Haulage Appliances -- Ropes -- Haulage Tubs and Tracks -- Cages and Winding Appliances -- Winding Engines for Vertical Shafts -- Winding without Ropes -- Haulage in Levels and Inclines -- The Working of Underground Engines -- Machinery for Downhill Haulage.