Филадельфия. 1923 год. Издательство The Franklin Institute. Издательский переплет. Состояние хорошее. Сохранена оригинальная обложка. THIS book contains the substance of five lectures delivered at The Franklin Institute, Philadelphia, in April, 1923. My warmest thanks are due to the Members of the Institute whose admirable arrangements and boundless hospitality made the delivery of these lectures one of the most delightful episodes in my life. The choice of chemistry as a subject for lectures by one whose work has been mainly in physics seems to call for some explanation. It has been customary to divide the study of the properties of matter into two sciences, physics and chemistry. In the past the distinction was a real one owing to our ignorance of the structures of the atom and the molecule. The region inside the atom or molecule was an unknown territory in the older physics, which had no explanation to offer as to why the properties of an atom of one element...