Excerpt from Series Spectra
This is the first of a series of monographs intended to supplement, and eventually to replace, my book on Modern Electrical Theory. Progress in the science is so rapid that it is impossible to make the book always justify its title by issuing new editions. It is proposed therefore to issue as soon as possible a series of monographs, similar to this, dealing with the most important advances in physics since the last edition and to continue the series whenever the need arises. When the present edition of the book is exhausted, those parts of it which can still be described as "modern" will be re-written and will form other monographs of the series.
The extent of each monograph corresponds roughly to that of a chapter of the book. Accordingly, in order that there may be continuity between the book and its supplements, the monographs are called chapters and numbered consecutively with the chapters of the book. Chapters I - XIV are in the book; subsequent chapters are monographs. References from one part of the work to another are made by chapter and page numbers.
Although the form of the book, and probably much of its authorship, will be changed, its purpose will remain unaltered. It is still intended, not for experts, but for students who, having taken the usual examination courses, wish to get into touch with research. It aims at giving them such knowledge of the chief regions in which research is active that they may proceed at once to the original memoirs; much more attention is therefore given to the clear exposition of the main ideas which inspire the research than to detailed statements of the results that have been obtained from it. References to original literature are not given; for, if the book attains its object, the literature to which it is most important that the reader should turn is that which is not yet published.
The choice of Series Spectra for the subject of the first monograph needs no justification. The work which is based on Bohr"s theory is undoubtedly the most important advance in pure physics since 1913.
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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. Это и многое другое вы найдете в книге Series Spectra (Classic Reprint) (Norman Robert Campbell)