Boron and silicon fluorides react readily with methyl or ethyl alcohols, forming heavy, fuming, almost colorless, and strongly acid liquids. These solutions have been studied by Liebig and Wohler,'W. Knop, 2 Gay-Lussac and ThCnardJ3 K~ hlman,~ and V. Gasselin. 6 Due, however, to the complexity of the mixtures and to the instability of the compounds when isolated, the acids present have never been definitely identified. By distilling a solution of ...