No coin nor oath required. For personal study only.
Book REVIEWS.
[J. F. I.
covered in detail, first the principles, then their application in two and three element tubes. When the subject of multi-electrode tubes is discussed, attention is centered on the fundamental electronic principles as here-to-fore rather than on the tubes individually. This is done by dividing the tubes into two classes-those which are designed to perform some function which cannot be performed readily by a triode or which will perform some function better than will a triode, and those having additional electrodes to permit them to perform simultaneously more than one function or permit them to function in two or more ways.
What may be taken as the second part of the book is that on the application of the tubes. It begins with a treatment on application in rectification and proceeds through voltage and power amplifiers, oscillators, modulators and demodulators. In another direction, photoelectric devices and circuits is discussed, referring to the theories underlying these photoelectric phenomena in the beginning of the book, and giving the characteristics of these devices and their uses. Finally there is presented the theory of cathode-ray tubes, their application, and the application of other electronic devices to circuits for electrical measurements.
At the end of each chapter there is a list of references covering the topic and suggested assignments comprising carefully composed questions. The book is well illustrated and contains a subject index. In addition to its being worth consideration as a class room text, it is a valuable book for the practicing engineer for study in case there is a need for formal training, as well as for reference.
R. H. OPPERMANN.
NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS.
📜 SIMILAR VOLUMES
The book is systematic in its accounting of the subject. It should furnish sufficient groundwork for further study. R. H. OPPERMANN.
Report No. 441, A Flight Investigation of the Spinning of the NY-I Airplane with Varied Mass Distribution and Other Modifications, and an Analysis Based on Wind-Tunnel Tests, by Nathan F
An important result of the measurements is to show that increased aspect ratio gives increased yawing moments for a given area, provided the maximum rudder displacement does not exceed, say, 23 °. If large rudder displacements are used, the effect of aspect ratio is not so great.