Pasteur Brewing Louis Pasteur – Science, Health, and Brewing To one pound of sugar, add one-half ounce of tartaric acid, two tablespoonfuls of good yeast. Dissolve the sugar in one quart of warm water; put all in a gallon jug, shake it well, fill the jug with pure cold water, let it stand uncorked twelve hours, and it is fit for use.
