Essence of Rennet.
Clean a rennet and cut it into small bits. Put these in a glass jar with three ounces of salt. Work the salt into the rennet with a spoon. Now cover the jar, and put in a cool place for six weeks. At the end of this time add a gill of rum and a pint of water. Let this stand for two days; then filter through paper, and bottle for use. This essence may be employed the same as rennet wine, using with it any flavor one wishes.