Electric Idghttngm

THE ELEMENTARY PRINCIPLES OF ELECTRIC LIGHT-
ING. By Alan A. Campbell Swintoh, Associate I.E.E. Second Edition,
Enlarged and Revised. With i6 Illustrations. Crown 8vo, is. 6d, cloth.
"Anyone who desires a short and thoroughly dear exposition of the elementary principles ol
electric-lighting cannot do better than read this little yrozTc.—Sratl/bni Observer,

Electricity,

A MANUA'L OF ELECTRICITY: Including Galvanism, Mag-
netism, Dia-Magnetism, Electro-Dynamics, Magno-Electricity, and the Electric
Telegraph. By Henry M. Noad, Ph.D., F.R.S., F.C.S. Fourth Edition,
With SOD Woodcuts. 8vo, £i 4s. cloth.
*' It is worthy of a place in the library of every public institution,"— Jl/i(»»«i^ yournal.
Dynamo Construction,

HOWTOMAKEA DYNAMO: A Practical Treatise for Amateurs.
Containing numerous Illustrations and Detailed Instructions for Construct-
ing a Small Dynamo, to Produce the Electric Light. By Alfred Crofts.
' Third Edition, Revised and Enlarged. Crown 8vo,2s. cloth.
"The instructions given in this unpretentious little book are sufficiently clear and explicit to

enable any amateur mechanic possessed of average' skill and the usual tools to be found in an

amateur's workshop, to build a practical dynamo ma.c\imc."— Electrician.
NATU RAL SCIENCE , etc.
Pneumatics and Acoustics,

PNEUMATICS : including Acoustics and the Phenomena of Wind

Currents, for the Use of Beginners. By Charles Tomlinson, F.R.S.
F.C.S., &c. Fourth Edition, Enlarged- i2mo, is. 6d. cloth.
" Beginners in thestudy of this important application of science could not have a better manual "
^Scotsman, " A valuable and suitable text-book for students of Acoustics and the Fheno-
uieiia of Wind Currents," — Schoolmaster,

Conchology.
