1930. Pp. (8), [ix]-xi, (1), [1]-588. With 12 Plates. Charts And Tables In Text. 8vo, Green Cloth, Gilt Titles To Spine. Slt. shelf wear. Preface; 1. Radioactive Transformations; 2. "a" Rays; 3. Absorption Of The "a" Rays; 4. Some Properties Of The "a" Particle; 5. Theories Of Absorption Of "a" Rays; 6. Secondary Effects Produced By "a" Rays; 7. General Rroperties Of The Radiations; 8. Scattering Of "a" And "b" Particles; 9. Collisions Of "a" Particles With Light Atoms; 10. Artificial Disintegration Of The Light Elements; 11. Radioactive Nuclei; 12. "b" Ray And "y" Ray Spectra; 13. Disintegration Electrons; 14.passage Of "b" Particles Through Matter; 15.scattering And Absorption Of "y" Rays; 16. Intensity Problems Connected With Emission Of "y" Rays; 17. Atomic Nuclei; 18. Miscellaneous: Apparent Radioactivity Of Ordinary Matter. Radio-activity Of Potassium And Rubidium. Counting Of Scintillations. Chemical Properties Of Radio-elements And Methods Of Separation. Preparation Of Radioactive Sources. Measurement Of Quantities Of Radium: Append: Index -Subjects-Names.