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Though no substances have been more generally used, both for the preservation of health, and the cure of diseases, than vegetable acids, yet hitherto they have been examined with so little care, that it has been the common received opinion, that they were all nearly of the same nature, at least as to their chemical properties, and possessed nearly of the same virtues; but the following account of neutral salts, made with these acids, and the fossil or mineral alkali, shews that they differ materially from one another.

philosophical transactions of the royal society of london

XLIX. An account of some neutral salts made with vegetable acids, and with the salt of amber; which shews that vegetable acids differ from one another; and that the salt of amber is an acid of a particular kind, and not the same with that of sea salt, or of vitriol, as alledged by many chemical authors. By Donald Monro, M. D. Physician to His Majesty's Army, and to Saint George's Hospital. F. R. S.