One kind, the ordinary kind of magnetism, is concerned with the physical plane; and this magnetism has to do with nourishment, with hygiene, with regular living, with right breathing and the regulation of activity and repose. This magnetism also depends on the age, like the ascending and descending notes in an octave. It may be likened to the season of spring, which comes and goes; and at the same time this magnetism is dependent upon everything belonging to the physical world, since it is a physical magnetism.