Basic Crystallography J. -J. Rousseau Department of Physics, University of Maine, Le Mans, France Translated from the French by A. James, University of Picardie, France Basic Crystallography deals with the basic principles of geometrical crystallography which are introduced through the study of lattices, symmetry operations and the enumeration and construction of point groups and space groups. Stereographic projection is used to enable students to visualise crystallographic structures in real space. The author devotes the second part of the book to X-ray crystallography, showing how different diffraction directions depend on the lattice and how spot intensities are related to the unit-cell. To give students an understanding of the principles of structural determination, the classical techniques of diffraction and methods of interpreting spectra are examined. To tackle the more challenging aspects of the subject, help is given to the student in the form of exercises with answers and a computer disk accompanies the book allowing readers to work through exercises and plot their own crystallographic data. Written primarily for final year undergraduate students of physics, chemistry, materials science and geometry the book will also be useful for engineering students.

'A Discourse Upon the Origin and the Foundation of the Inequality Among Mankind, written by Jean-Jacques Rousseau, is a thought-provoking and influential philosophical work that delves into the origins and nature of social inequality. In this book, Rousseau examines the fundamental causes of inequality and offers a critical analysis of the social structures and institutions that perpetuate it. Rousseau's work raises profound questions about the nature of human society, justice, and the role of government. He posits that a return to a more egalitarian state is possible through a reevaluation of societal norms and a restoration of individual freedom and equality. The book stands as a foundational text in political philosophy, challenging readers to critically examine the causes and consequences of social inequality and envision a more just and equitable society. The author's ideas continue to influence discussions on politics, ethics, and social justice, making this work a significant contribution to philosophical thought.

‘A Discourse Upon the Origin and the Foundation of the Inequality Among Mankind, written by Jean-Jacques Rousseau, is a thought-provoking and influential philosophical work that delves into the origins and nature of social inequality. In this book, Rousseau examines the fundamental causes of inequality and offers a critical analysis of the social structures and institutions that perpetuate it. Rousseau's work raises profound questions about the nature of human society, justice, and the role of government. He posits that a return to a more egalitarian state is possible through a reevaluation of societal norms and a restoration of individual freedom and equality. The book stands as a foundational text in political philosophy, challenging readers to critically examine the causes and consequences of social inequality and envision a more just and equitable society. The author’s ideas continue to influence discussions on politics, ethics, and social justice, making this work a significant contribution to philosophical thought.

Basic Crystallography J. -J. Rousseau Department of Physics, University of Maine, Le Mans, France Translated from the French by A. James, University of Picardie, France Basic Crystallography deals with the basic principles of geometrical crystallography which are introduced through the study of lattices, symmetry operations and the enumeration and construction of point groups and space groups. Stereographic projection is used to enable students to visualise crystallographic structures in real space. The author devotes the second part of the book to X-ray crystallography, showing how different diffraction directions depend on the lattice and how spot intensities are related to the unit-cell. To give students an understanding of the principles of structural determination, the classical techniques of diffraction and methods of interpreting spectra are examined. To tackle the more challenging aspects of the subject, help is given to the student in the form of exercises with answers and a computer disk accompanies the book allowing readers to work through exercises and plot their own crystallographic data. Written primarily for final year undergraduate students of physics, chemistry, materials science and geometry the book will also be useful for engineering students.

'A Discourse Upon the Origin and the Foundation of the Inequality Among Mankind, written by Jean-Jacques Rousseau, is a thought-provoking and influential philosophical work that delves into the origins and nature of social inequality. In this book, Rousseau examines the fundamental causes of inequality and offers a critical analysis of the social structures and institutions that perpetuate it. Rousseau's work raises profound questions about the nature of human society, justice, and the role of government. He posits that a return to a more egalitarian state is possible through a reevaluation of societal norms and a restoration of individual freedom and equality. The book stands as a foundational text in political philosophy, challenging readers to critically examine the causes and consequences of social inequality and envision a more just and equitable society. The author's ideas continue to influence discussions on politics, ethics, and social justice, making this work a significant contribution to philosophical thought.

‘A Discourse Upon the Origin and the Foundation of the Inequality Among Mankind, written by Jean-Jacques Rousseau, is a thought-provoking and influential philosophical work that delves into the origins and nature of social inequality. In this book, Rousseau examines the fundamental causes of inequality and offers a critical analysis of the social structures and institutions that perpetuate it. Rousseau's work raises profound questions about the nature of human society, justice, and the role of government. He posits that a return to a more egalitarian state is possible through a reevaluation of societal norms and a restoration of individual freedom and equality. The book stands as a foundational text in political philosophy, challenging readers to critically examine the causes and consequences of social inequality and envision a more just and equitable society. The author’s ideas continue to influence discussions on politics, ethics, and social justice, making this work a significant contribution to philosophical thought.