This is done in such a way that no reader, however non-technical, should fear being lost in a maze of complex technicalities. Each subject is discussed in a systematic manner in clear and simple language.
A large number of subjects are covered. They include industries dependent upon various chemicals such as soap making, the purification of water, sulphur, fertilizers, explosives, and carbon the producer of energy, etc. Chapters that may be classed as having particular appeal include the story of iron and steel, pottery and glass, dependence on chemistry by the farmer, the housewife, the physician, and the manufacturer. A new chapter added in this second edition is entitled "The Archw.ologists' Dependence on Chemistry." This chapter deals to a considerable extent with recent excavations at Corinth and at the Agora in Athens.
The book is illustrated with diagrams and photographs throughout, adding materially to understanding and inspiration. In the appendix there is a list of references, divided into the various chapters of the book. The subject index in the back should be very useful and it gives an idea of the great breadth of coverage in the book.
This book can be recommended to anyone as worthwhile. It is directed especially to the layman who cannot help but obtain a liberal knowledge of this great science. But the technical man can also derive much enjoyment and appreciation of many technical activities with which he may be only partly familiar. To all, it should provide inspiration to seek the truth. R. H. OPPERMANN.