s. of sugar and half an ounce of tartaric acid, in 26
s. of boiling water. Let the solution stand for several days; then add 8 ounces of putrid cheese broken up with 3
s. {115} of skimmed and curdled sour milk, and 3
s. of levigated chalk. The mixture should be kept and stirred daily in a warm place, at the temperature of about 92° Fahr., as long as gas is evolved, which is generally the case for five or six weeks.
The liquid thus obtained, is mixed with an equal volume of cold water, and 8
s. of crystallized carbonate of soda, previously dissolved in water, added. It is then filtered from the precipitated carbonate of lime; the filtrate is to be evaporated down to 10