Popular Science Edition . — Translated from French by C. Baklanova . 2nd Edition . - M. : Atomizdat, 1965 - 232 s. The book is written by one of the famous scientists who himself took part in the development of quantum physics, even when it took its first steps. This is one of the few books where the non-relativistic quantum theory, which has already become classical, is popular and quite fully described, but is still not very clear and not very familiar to those who are not directly engaged in this field of physics. The whole book is written in the form of a historical overview of the main ideas that inevitably had to lead and really led to the creation of quantum mechanics. De Broglie expounds the entire quantum theory without a single formula This is an example of the best style of popular literature , where the author never falls into a bad tone of condescension to the reader , which is expressed in , which is very primitive with the help of explanations "on the fingers" and vulgar "pictures" supposedly "underdeveloped" reader trying to explain some high and inaccessible matter On the contrary, it is a serious conversation about serious and difficult things, suggesting to the reader the ability to the same exactly intellectual tension that the author has to do in order to set out difficult questions as clearly and easily as possible. The popular book does mainly the fact that the presentation does not use a mathematical apparatus at all and no special knowledge is required from the reader. It requires only a general culture and goodwill, which is stimulated by a direct interest in the subject. The first edition of the book was met with great interest by readers, and its circulation quickly dispersed. De Broglie's book is of undoubted interest to a wide range of physicists, to students studying modern physics, and to readers interested in the success of physics. Content. Value of quanta. Classical Mechanics . Classical Physics . Atoms and particles. Theory of Relativity . The Emergence of Quantum in Physics . Bora Atom . Principle of Conformity. Wave mechanics . Heisenberg's Quantum Mechanics . Probabilistic interpretation of new mechanics . Electron spin. Wave mechanics of systems and the Pauli principle