Joseph Proust was born in Angers,France. Proust was born on September 26, 1754 and died July 5 1826 at the age of 71. He worked as an chemistry teacher at Segovia and the the University of Salamanca in Spain.
Based on his studies on copper carbonate reaction Proust discovered that each pure compound has its own characteristic elemental composition.
Joseph Proust Law of Definite Proportions (1799)
Proust's largest accomplishment into the realm of science was disproving Claude Louis Berthollet with the Law of Definite Proportions- which states that the principle that the elements that comprise a compound are always in a certain proportion by mass.
Last of the Mohicans takes place in the 1750's in the wild forest of Western New York.