Remarkable Spirit Manifestations #248755

Professor Crooks, among learned persons, is acknowledged as one of the most scientific men of the world, but as this pamphlet will come in the hands of many persons not versed in science, a few words may be said of his great achievement: He is a great chemist and discoverer of the new metal thallium; also, of the supra gaseous state in which matter exists in high vacua, and is the deviser of the radiometer.