Alexander Findlay - A Hundred Years of Chemistry - Gerald Duckworth & Co LTD - 3 Henrietta Street, London, W.C.2, 1965

Radical theory - alcohol has methylene and methyl

Theory of substitution - Brongniart and candles led to chlorine, bromine, iodine - acetic acid later - combined they show atom does not equal equivalent (1 hydrogen and 1 halogen compared to 2 hydrogens to 1 oxygen)

Acetic acid also led to type theory


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