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Cavendish Laboratory : J.J. Thomson's positive ray tube (1908)

Cavendish Laboratory

<p style='text-align: justify;'>J.J. Thomson's positive ray tube. This is the instrument developed by Thomson to study the properties of positive rays, the positively charged counterparts of the cathode rays. Three or four years later, he was joined by Aston whose experimental skills were essential to the success of the future programme which resulted in the discovery of non-radioactive isotopes, including those of neon-20 and neon-22.</p>


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