text: * [https://archive.org/details/radioactivity00ruthgoog Radio-activity] (1904), 2nd ed. (1905), 
  * [https://archive.org/details/radioactivetran02ruthgoog Radioactive Transformations (1906)], 
  * [https://archive.org/details/radioactivesubst00ruthuoft Radioactive Substances and their Radiations (1913)]
  * The Electrical Structure of Matter (1926)
  * The Artificial Transmutation of the Elements (1933)
  * The Newer Alchemy (1937)