Joseph Henry was always interested in atmospheric electricity and his lifelong study with thunderstorms played an important role in his research about electromagnetism. Henry started his largest investment with lightning in July, 1841 in Princeton, when a very severe thunder storm hit Princeton. The list below shows the major writings and records during this period. Before 1841, Henry had also shown interest in electrical storm before this investment:
Following are the major writings and experiment records by Henry on his study of lightning from 1841 to 1846, during which period Henry was mainly engaged with the study of induction and discharge.
Several of his early experiments on induction from lightning were mentioned. From the 4th section, P.7, first paragraph, it seemed that Henry was not clear about the difference between electromagnetic induction and radio transmission and reception.