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Joseph John Thomson 

Cheetham Hill, Manchester 18.December.1856 - Cambridge 30.August.1940
1897  Discovery of electron  
In the course of a study of the cathode rays in the laboratory it discovered in the 1897 ELECTRON and succeeded to measure of the charge and the mass. It arrived to the conclusion of the existence of “a new state of the matter, in which all the matter is of a single kind, and this matter is the substance with which the chemical elements are constructed to all”.