London: Taylor and Francis, 1921. Hardcover. First Edition. vii, , 1032 pp. 8vo. 27 Plates . Original brown library bindings with gold embossed titling to spine. Blind embossed library stamp on first free endpaper along with an ink WITHDRAWN stamp, blind embossed library stamp on title page; due date sheet tipped onto last page of volume, very clean within. Fine.
William Harkins coins the term "Neutron" in the first paper. Chadwick & Bieler describe the 1921 experiment in which Jathey bombarded helium nuclei with alpha particles and observed deflections inconsistent with the force holding the nucleus together and giving the first indication of a new force of nature acting on the atomic nucleus.