The Principles of Quantum Mechanics

IT is now twenty years since the theory of quantum mechanics was founded, and not much less since the first edition of Dirac's book was published. Ever since, it has been a classic of scientific literature.The Principles of Quantum MechanicsBy Prof. P. A. M. Dirac. (International Series of Monographs on Physics.) Third edition. Pp. xii + 312. (Oxford: Clarendon Press; London: Oxford University Press, 1947.) 25s. net.