C. L. Cory's "A Treatise on Electricity and Magnetism" is a comprehensive work that explores the fundamental principles of electricity and magnetism. The book is divided into two parts: the first part, which is theoretical, forms the first volume, while the second part, more experimental in nature, will examine various phenomena, measurement methods, and applications. The authors, E. Mascart and J. Joubert, along with E. Atkinson, aim to provide a clear and systematic understanding of the subject, emphasizing the mechanical theory of electricity and the insights of Faraday and Maxwell. The first volume focuses on static electricity, electrical currents, and magnetism. It begins with an introduction to the basic concepts of electricity, such as conductors and insulators, and the two types of electricity—positive and negative. The text explains the nature of electrical forces, the concept of electrical mass, and the law of inverse squares, which governs the force between two electrical bodies. It also discusses the distribution of electricity on conductors, the phenomenon of induction, and the concept of electrical equilibrium. The book delves into the potential of electrical systems, the concept of equipotential surfaces, and the relationship between potential and force. It also covers the mathematical expressions of force in terms of potential, the flow of force, and the application of Green's theorem. The text further explores the equations of Laplace and Poisson, which are fundamental in the study of potential fields and the distribution of electricity on conductors. The authors emphasize the importance of understanding the underlying principles of electricity and magnetism, and they provide a detailed analysis of the phenomena, their causes, and their implications. The work is a valuable resource for physicists and engineers, offering a clear and rigorous treatment of the subject, supported by both theoretical and experimental evidence. The book is structured to facilitate a deep understanding of the subject, making it an essential reference for those studying or working in the field of electricity and magnetism.C. L. Cory's "A Treatise on Electricity and Magnetism" is a comprehensive work that explores the fundamental principles of electricity and magnetism. The book is divided into two parts: the first part, which is theoretical, forms the first volume, while the second part, more experimental in nature, will examine various phenomena, measurement methods, and applications. The authors, E. Mascart and J. Joubert, along with E. Atkinson, aim to provide a clear and systematic understanding of the subject, emphasizing the mechanical theory of electricity and the insights of Faraday and Maxwell. The first volume focuses on static electricity, electrical currents, and magnetism. It begins with an introduction to the basic concepts of electricity, such as conductors and insulators, and the two types of electricity—positive and negative. The text explains the nature of electrical forces, the concept of electrical mass, and the law of inverse squares, which governs the force between two electrical bodies. It also discusses the distribution of electricity on conductors, the phenomenon of induction, and the concept of electrical equilibrium. The book delves into the potential of electrical systems, the concept of equipotential surfaces, and the relationship between potential and force. It also covers the mathematical expressions of force in terms of potential, the flow of force, and the application of Green's theorem. The text further explores the equations of Laplace and Poisson, which are fundamental in the study of potential fields and the distribution of electricity on conductors. The authors emphasize the importance of understanding the underlying principles of electricity and magnetism, and they provide a detailed analysis of the phenomena, their causes, and their implications. The work is a valuable resource for physicists and engineers, offering a clear and rigorous treatment of the subject, supported by both theoretical and experimental evidence. The book is structured to facilitate a deep understanding of the subject, making it an essential reference for those studying or working in the field of electricity and magnetism.