No graduate student of quantum theory should leave it unread"--W.C Schieve, University of Texas

    The theme of Heisenberg's exposition is that words and concepts familiar in daily life can lose their meaning in the world of relativity and quantum physics. This in turn has profound philosophical implications for the nature of reality and for our total world view.

    Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions that are true to the original work.

    Dozens of experiments require nothing more than soap, straws, and bits of rubber, yet they impart profound and fundamental concepts relating to the science of fluids. Geared toward readers without much background in the subject, the book begins without difficult calculations and concludes with only the simplest equations. Lucid and concise experiments allow observers to formulate their own practical understanding of soap bubbles and provide a foundation for more serious studies. More than 80 illustrations complement the text.

    published in 1939 under title: Introduction to atomic physics.

    of Toledo), John M. Prausnitz (U. of California-Berkeley), and John P. O'Connell (U. of Virginia) describe and critically review various estimation procedures for a limited number of properties of gases and liquids. Among those properties are critical and other pure component properties; pressure-volume- temperature relationships and thermodynamic properties of pure components and mixtures; vapor pressures and phase-change enthalpies; standard enthalpies of formation; standard Gibbs energy of formation; heat capacity; surface tension; viscosity; thermal conductivity; diffusion coefficients; and phase equilibria. They compare most of the estimated properties to experimental findings to indicate reliability, and illustrate most methods with examples.