Engineering

Abstract

(1) PROF. HENRY BRIGGS, Hood professor of mining in the University of Edinburgh, is the general editor of Messrs. Methuen's monographs on coal-mining, of which the volume on “The Ventilation of Mines” is one. Based on lectures given in the Royal School of Mines in 1927 and afterwards amplified in Colliery Engineering during thefollowing year, the book treats of the flow of air in galleries, control of ventilation, various types of fans, measurement of pressures, and fan testing. Efficiency in ventilation is an important economic problem, and in some collieries the actual weight of the air put through per day is stated to be as much as ten or twelve times the tonnage of coal extracted. In a certain Prussian mine the fan is nearly 30 feet in diameter: it is rated to deliver 710,000 cubic feet per minute against a 141/4 in. water gauge and is driven by a steam engine of 2140 h.p.

(1) The Ventilation of Mines: Generation of the Air Current.

By Prof. Henry Briggs. (Methuen's Monographs on Coal-Mining.) Pp. xiv + 136. (London: Methuen and Co., Ltd., 1929.) 7s. 6d. net.

(2) Mining Subsidence.

By Prof. Henry Briggs. Pp. vii + 215. (London: Edward Arnold and Co., 1929.) 14s. net.