Assertion: physicist's theory | /r/HasProperty | proposed in early 19th century
Facets:
value: by the chemist
type: OTHER
Source sentences:
text: The atomic theory of matter had been proposed again in the early 19th century by the chemist John Dalton and became one of the hypotheses of the kinetic-molecular theory of gases developed by Clausius and James Clerk Maxwell to explain the laws of thermodynamics.