Put 1 gill buttermilk into a quart of new, rich milk, and add 4 lumps white sugar; see that the sugar is dissolved. Put in a covered vessel, in a warm place, for 10 hours; it will then be thick. Pour from one pitcher to another, so that it may become uniformly thick, then bottle and set away in a warm place. It will be good in 24 hours in summer and 36 in winter. The bottles must not only be tightly corked, but the corks tied down. Shake the bottles well before opening. This is an excellent drink for people with weak digestion, and is also good for children.