Of the greatest importance is the alcoholic fermentation brought about by yeast cells (Saccharomyces cerevisiae seu vini); this follows the equation CH120 6 =2C 2 H 6 0+2CO 2, Pasteur considering 94 to 95% of the sugar to be so changed.
The name ether appears to have been applied to the drug only since the times of Frobenius, who in 1730 termed it spiritus aethereus or vini vitriolatus.
vini in that the alcohol is transformed into acetic acid.
At the same time Paracelsus uses the word for a volatile liquid; alcool or alcool vini occurs often in his writings, and once he adds "id est vino ardente."
Another specimen of his wit is furnished by the following epigram of the five reasons for drinking: Si bene quid memini, causae sunt quinque bibendi; Hospitis adventus, praesens sitis atque futura, Ant vini bonitas, aut quaelibet altera causa.