This book, the second edition of a work first published ten years ago, covers the physics and chemistry of ceramic materials. While the main divisions and chapter headings remain the same, much of the content has been rewritten to include recent advancements. The author emphasizes practical information and guidance for ceramists rather than a critical scientific discussion of current theories. The book is well-suited for its intended audience and covers a wide range of topics effectively. Prof. Elton Mayo explores the human problems in industrial civilization through the lens of 'fatigue.' He traces the development of industrial psychology in Great Britain and highlights the work of British investigators. The book includes detailed descriptions of experiments and investigations in an American factory, leading to considerations of sociological issues and the role of the 'new administrator.' Mayo concludes that the primary need is to develop techniques for easy social relationships and to ensure individuals feel economically valuable to the community. The book is praised for its psychological insight and sociological purpose. This volume, the first recent work on the algal flora of the United States, marks a significant advancement in botanical literature. It describes the characters and morphology of all genera of freshwater algae found in the United States and related forms in salt lakes. While species descriptions are not detailed, characteristic and common ones are indicated and illustrated. The keys are based on vegetative characters, making them useful for the average worker. The book is recommended for those interested in algae. This volume focuses solely on the techniques of ancient Peruvian textiles, building on the author's previous work on more general questions. It includes descriptions of various methods for producing patterns through interweave variation and a section on embroidery. The techniques have been tested by the author in practice. The fabrics are illustrated with a series of plates, each accompanied by a detailed description. The Peruvian textile techniques appear to have reached an advanced stage early in the pre-Inca period.This book, the second edition of a work first published ten years ago, covers the physics and chemistry of ceramic materials. While the main divisions and chapter headings remain the same, much of the content has been rewritten to include recent advancements. The author emphasizes practical information and guidance for ceramists rather than a critical scientific discussion of current theories. The book is well-suited for its intended audience and covers a wide range of topics effectively. Prof. Elton Mayo explores the human problems in industrial civilization through the lens of 'fatigue.' He traces the development of industrial psychology in Great Britain and highlights the work of British investigators. The book includes detailed descriptions of experiments and investigations in an American factory, leading to considerations of sociological issues and the role of the 'new administrator.' Mayo concludes that the primary need is to develop techniques for easy social relationships and to ensure individuals feel economically valuable to the community. The book is praised for its psychological insight and sociological purpose. This volume, the first recent work on the algal flora of the United States, marks a significant advancement in botanical literature. It describes the characters and morphology of all genera of freshwater algae found in the United States and related forms in salt lakes. While species descriptions are not detailed, characteristic and common ones are indicated and illustrated. The keys are based on vegetative characters, making them useful for the average worker. The book is recommended for those interested in algae. This volume focuses solely on the techniques of ancient Peruvian textiles, building on the author's previous work on more general questions. It includes descriptions of various methods for producing patterns through interweave variation and a section on embroidery. The techniques have been tested by the author in practice. The fabrics are illustrated with a series of plates, each accompanied by a detailed description. The Peruvian textile techniques appear to have reached an advanced stage early in the pre-Inca period.