London: Longmans, 1933. hardcover. Illustrated with 8 plates and several in-text diagrams. 248pp. 8vo, blue cloth (ex-library copy with some wear and usual markings). New York & London: Longmans, Green & Co, 1933. First Edition. A very good(-) copy. very good(-).
Aston was 1922 Nobel prize recipient for his discovery of isotopes in non-radioactive elements. The present work was completed with the collaboration of C.P. Snow.