London: Oxford University Press, 1935. Second edition. Hardcover. 8vo. Black cloth in original printed dust jacket. Very good plus in a good DJ. Jacket heavily toned with small chips and tears. Endpapers slightly foxed and pages mildly yellowed, but overall quite clean and sharp throughout. 300pp. Very good + / good. Item #21799
Second edition of this early treatise on quantum mechanics. Scarce in the dust jacket.