Radio-Activity.

Cambridge University Press, 1904. Fine hcalf, raised bands, gilt lettering. Probably with renewed spine. On both covers a large gilt crowned coat of arms. Corners professionally repaired. (2),VIII,(2),399,(1) pp. Textfigs. and 1 plate facing p. 169. Halftitle and a few leaves with small brownspots in upper margin, otherwise a fine clean copy. First edition. This work marks a new epoch in the understanding of the nature of nuclear physics. "After the discovery of thorium in 1900 new concepts of atomic structure followed from the brilliant experiments of Rutherford. A new theory of atomic disentegration was proposed, then the nuclear nature of the atom. He discovered and named alpha and beta rays emitted from radioactive salts and predicted that disintegration of some radioactive elements would generate helium. he also produced in the laboratory the first artificial transmutation of one element into another." (Dibner, Heralds of Science No. 51). - Horblit No 91.