Pasteur Brewing Louis Pasteur – Science, Health, and Brewing Take one ounce of citric acid, one pint of porter, one and one-half pints of raisin wine, one gill of orange-flower water, one gallon of good brandy, two and one-quarter quarts of water. First, dissolve the citric acid in the water, then add to it the brandy; next, mix the raisin wine, porter, and orange-flower water together; and lastly, mix the whole, and in a week or ten days it will be ready for drinking and of a very mellow flavor.