what did the scientist thomson discover?
Electron Mass spectrometry
contradiction
 Alexander H. Smith related a story of how unique circumstances led to the development of a local superstition about the species : 

neutral
 Thomson 's plum pudding model was disproved in 1909 by one of his former students , Ernest Rutherford , who discovered that most of the mass and positive charge of an atom is concentrated in a very small fraction of its volume , which he assumed to be at the very center . 

contradiction
 Despite the dissatisfaction of most physicists with Fresnel 's partial aether @-@ dragging hypothesis , repetitions and improvements to his experiment ( see sections above ) by others confirmed his results to high accuracy . 

contradiction
 Shaler concluded Agassiz was testing him to see if he was capable of " doing hard , continuous work without the support of a teacher " and redoubled his efforts , starting from scratch and , over the course of seven ten @-@ hour days , managed to describe the specimen to Agassiz 's satisfaction . 

neutral
 During the early morning surprise attack , on June 15 , 1914 , Thomson was shot in the chest ( despite the fact that rebels were attacking behind him ) and died within a few minutes . It is probable that an Italian sniper was responsible . 
