12,13, The Wenker and Berninghaus Locking Device for
Dam Doors; 14-17, Dam Construction: 18, Damming a Gallery Lined with
Iron: 19, Support for Cable.--Sheet VI., =Working with Diving Gear in
Irrespirable Gases--Gallery Work.= Figs. 1-4, Air-Lock Work (Mayer
System); 5-7. Air-Lock (Mauerhofer's Modification of the Mayer System);
8-11, Construction of Dams at the Pluto Shaft.--Sheet VII., =Working
with Diving Gear in Irrespirable Gases (Mayer System)--Appliances in the
Shaft.= Figs. 1, 2, Sections of Shaft and Air Apparatus; 3, Salzmann
Reducing Valve for Reserve Air Supply; 4,5, L. v. Bremen's Respiration
Apparatus with Karwin Reserve Appliance: 6, Cross Section of the
Franziska Shaft; 7, Method of Supplying Air to Main Pipe and Winding
same on Drum; 8, Clamp.

=Press Opinions.=

"A work of this extremely valuable character deserves to be made
widely known amongst colliery managers and mining engineers at home
and abroad."--_Coal and Iron._

"This book is, in a manner, unique. The literature of mining
accidents is fairly extensive, but it consists largely of
departmental Blue Books."--_Sheffield Daily Telegraph._

"A concise and lucid description of the principal methods pursued,
especially in fiery mines, and of the various appliances employed,
such as respiratory and rescue apparatus, dams, etc."--_Staffs
Advertiser._

"The prevention of spontaneous combustion in collieries and the
extinction of underground fires are duties that fall heavily on many
colliery managers. They should, therefore, welcome this translation
of Mr. Lamprecht's German treatise."--_Ironmonger._

"The book under notice supplies the needed full description,
drawings, and mode of using these new appliances in actual fires,
and should be studied by every colliery manager, seeing that even
our best managed collieries have not been free from fires, more or
less disastrous to life and property.--_Colliery Manager._

* * * * *

=THE PREVENTION OF SMOKE.= Combined with the Economical Combustion of
Fuel. By W.C. POPPLEWELL, M.Sc, A.M.Inst., C.E., Consulting Engineer. 46
Illustrations. 190 pp. 1901. Demy 8vo. Price 7s. 6d.; India and
Colonies, 8s.; Other Countries, 8s. 6d.; strictly net.

=Contents.=

Introductory.--Chapters I., Fuel and Combustion.--II., Hand Firing in
Boiler Furnaces.--III., Stoking by Mechanical Means.--IV., Powdered
F