Dr. Wratislaw's Strengthening Extract of Beef

Take one pound of lean beef and cut the same into small pieces, say half an inch square; place them in a jar with a gill of water, and then put it in the oven for half an hour, after which time take it out and add one pint of water, replacing it in the oven for an hour and a half; when, after freeing it from its grease, and straining it through a muslin, it will be fit for use.