CHAPTER VI. =Electrification= 39

Some Varieties of Electricity.--Exp. 51-52, To study electrification by friction.--Discussion.--Electrified and Neutral bodies.--Force; Resistance; Work; Potential Energy; Electrification.--Heat and Electrification.--Exps. 53-54, To study electrical attraction.--Discussion.--Exp. 55, To study mutual attractions.--Mutual Attractions.--Exps. 56-58, To study electrical repulsions.--The Carbon Electroscope.--Discussion of Experiments 56, 57, 58.--Exp. 59, To study the electrification of glass.--Questions.--Exp. 60, To compare the electrification produced by ebonite and flannel with that produced by glass and silk.--Discussion.--Laws.