XXIII.—A Contribution to our Knowledge of the Physical Properties of Methyl-Alcohol

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Abstract
Since its discovery by Dumas and Péligot in 1834, methyl-alcohol has been the subject of a great many researches, and as a result we have long had a perfectly certain knowledge of its atomic composition, and a very accurate knowledge of a great many of its reactions. Yet the physical properties of the substance CH4O have not yet been determined with a satisfactory degree of precision. At this we need not wonder. For the study of the transmutations of a species a very impure specimen may suffice, and a series of such studies may leave no doubt about the correct atomic formula of the species in question, and consequently also, if it is a volatile substance, about its perfect gas density. But no other physical properties can be determined otherwise than by direct experiments on a pure specimen. And pure methyl-alcohol is very difficult to obtain. In whatever reasonable sense we may take the word “pure,” as attached to the name of a chemical preparation, “pure” methyl-alcohol must be admitted to have been little more than a chemical fiction until Wöhler in 1852 discovered his well-known (oxalate) process for its extraction from wood-spirit.

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