Wolf's essay considers the homeopathic medicine Apis Mellifica, or the poison of the honey bee, as a therapeutic agent based on his experience as a practicing physician.

This volume contains stories, poems, myths, and facts about lots of different birds, intended for teaching children. It is divided into nine parts, each covering a different type of bird.

Joseph Priestley, FRS (13 March 1733 (O.S.) – 6 February 1804) was an 18th-century English theologian, Dissenting clergyman, natural philosopher, chemist, educator, and political theorist who published over 150 works. In “Experiments and Observations on Different Kinds of Air,” he reviews experiments with gases. A common theme in this work is measuring the volumes of gases held in glass tubes, and their increase or decrease when exposed to other substances. He also tests the effects of gases on mice, plants and insects...