12 Mr. Edward Arnold’s List of New Books 
A TEXT-BOOK OF ELECTRICAL 
ENGINEERING. 
By Dr. ADOLF THOMALEN. 
Translated by GEORGE W. O. HOWE, M.Sc., Wut. Scu., 
A.M.LE.E., 
LxecTURER In ELECTRICAL ENGINEERING AT THE CENTRAL TECHNICAL COLLEGE, SOUTH 
| KENSINGTON. 
Royal 8v0, With 454 Illustvations, 15s. net. 
This translation of the ‘Kurze Lehrbuch der Electrotechnik’ 
is intended to fill the gap which appears to exist between the 
elementary text-books and the specialized works on various branches 
of electrical engineering. It includes additional matter which is to 
be introduced into the third German edition, now in preparation. 
The book is concerned almost exclusively with principles, and does 
not enter into details of the practical construction of apparatus and 
machines, aiming rather at laying a thorough foundation which shall 
make the study of works on the design of machinery more profitable. 
HYDRAULICS. 
By F. C. LEA, B.Sc., A.M.Inst.C.E., 
Srnion Wuitwortu Scuoxar, A.R.C.S.; LecTurRER IN APPLIED MECHANICS AND ENGINEERING 
Desicn, Ciry anp GuILps or LonpDoN CENTRAL TECHNICAL COLLEGE, LONDON. 
Demy 8vo. 18s. net. 
This book is intended to supply the want felt by students and 
teachers alike for a text-book of Hydraulics to practically cover the 
syllabuses of London and other Universities, and of the Institution 
of Civil Engineers, With this end in view, and to make the work 
as self-contained as possible, the earlier chapters are devoted to the 
consideration of fluids at rest and the stability of floating bodies. 
For the chapters on the flow of water, in pipes and channel, and 
through orifices and over weirs, the latest experimental work has 
been carefully consulted, and it is believed the résumé given of that 
work will not only be of use to students and teachers, but also to 
practical engineers. The construction of modern hydraulic machines 
is shown by a number of examples. A chapter on the resistance of 
ships’ models is inserted, and the method of determining the still- 
water resistance of ships from that of the model is given. The work 
is completely illustrated, and the methods of using the formule 
given are shown by worked Arithmetical Examples. 
