Law of definite proportion, sometimes also called the law of constant composition.
The law of definite proportions was developed by Joseph Proust in 1806.
The law of definite proportions states that all chemical compounds have constant proportions of their components.
Dalton\'s principle of compounds supports the law of definite proportions.
In was in 1799 that Joseph Proust discovered the law of definite proportions, or Proust's Law. Proust was a French chemist.
Well definite is broad and multiple is more exact that's about what I can think of
For example the law of definite proportions.
Joseph Proust
The Law of Multiple Proportions was proposed by John Dalton.
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Joseph Louis Proust eleborated the Law of definite proportions.
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