48189
Therefore , they were not atoms , but a new particle , the first " subatomic " particle to be discovered , which he originally called " " corpuscle " " but was later named " electron " , after particles postulated by George Johnstone Stoney in 1874 .
 George Johnstone Stoney
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 George Johnstone Stoney