Medical extracts. [electronic resource] : Being a concentrated view of some late discoveries in chemistry, and the new theory and practice of physic, thereby introduced. By a friend to improvements. There are three things which almost every person gives himself credit for understanding, whether he has taken any pains to make himself master of them or not. These are, I. The art of mending a dull fire: 2. Politics: and, 3. Physic. From Dr. Beddoes's guide to parental affection.