Timeline of United States discoveries
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1831 Discovery of chloroform
Chloroform is a chemical compound known as trihalomethanes that does not undergo combustion in air, although it will burn when mixed with more flammable substances. Chloroform was first discovered in July 1831 by American physician Samuel Guthrie, independently a few months later by French chemist Eugne Soubeiran and then by German chemist Justus von Liebig.
1859 Discovery of petroleum jelly
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