As to speed, a pupil new to the work of precipitation would probably be able to image only a few words at a time, and would, therefore, get on hardly more rapidly than if he wrote his letter in the ordinary way, but a more experienced individual *who could visualize a whole page or perhaps the entire letter at once would get through his work with greater facility. It is in this manner that quite long letters are sometimes produced in a few seconds at a seance. When a picture has to be precipitated the method is precisely the same, except that here it is absolutely necessary that the entire scene should be visualized at once, and if many colours are required there is the additional complication of manufacturing them, keeping them separate, and reproducing accurately the exact tints of the scene to befc represented. Evidently there is scope here for the exercise of the artistic faculty, and it must not be supposed that every inhabitant of the astral plane could by this method produce an equally good picture ; a man who^ h#d # been a great artist in life, and. had