This work has been well known to a host of engineers.
First published in 1907 it went through editions of 1911, 1927 and now the fourth edition appears in revised and modernized form.
The book at hand is volume two and carries on the study of certain subjects which were introduced in their simpler aspects in volume one, as we!! as additional material.
It is a combination text and laboratory guide and as such, advantage is taken of the opportunity of having the student perform experiments at places in the text which will clarify and impress the subject matter.
By following the text and suggested experiments it is easily seen that the procedure is a valuable one.
This volume picks up the thread where the first volume ended.
It begins with chapter 26 on electrostatic capacitance and proceeds through a study of capacitance and inductance in A-C circuits.
Eight experiments are outlined in this study.
Then the text proceeds through the various topics concerned with power circuits and machinery.
Voltage regulation on long and short transmission lines, fault location on lines including a description of the Allen and Gross fault locater, methods of measurement in symmetrical components, power measurements, transformations and conversions, synchronous machines, induction motors, single phase motors, and controllers for A.C. motors are a!! given expert treatment.
Experiments illustrating methods and points of importance are injected at appropriate places in the text.
Attention is then given the oscillograph, to which a full chapter is devoted with explanations through experiments on the electromagnetic, hot-filament cathode ray, and Dufour type cathode ray oscillographs.
Then there follows a discussion on harmonic analysis of periodic waves, a treatment on the fundamentals of electronic devices, and high frequency measurements.
The volume is a large one but nothing is spared in making the treatment complete.
Simpleness of presentation without an excess of unimportant matter is outstanding which is plain evidence of much successful experience in teaching the subject.
The many illustrations and diagrams, the comprehensive subject index, and the wealth of practical, usable material make this book a valuable one for study and reference.
Ii. H. OPPERMANN.