In place of sounds, others may pursue odor, taste, feeling, motion, hearing, etc., to their original sources, and make similar observations. In so doing they will find that _all phenomena, the products of our faculties, abilities, or gifts, originally proceed from the same or similar sources; that there is a homogeneity of proceeding, mainly consisting in various modes of breathing, in the production of them all; the end organs of our senses or gifts finally determining definite special results_. For vocal utterance, we draw our inspiration for various results to be attained, from the air, and breathe in a different mode for every special performance. These modes of breathing, though the same for all persons in a general sense and leading through the same channels, in a more restricted sense are different for every nationality. There is no "danger" connected with these pursuits, in spite of Mr. Heidenhain's fears; which fact is due to the duality of the nature of each and all our various faculties, there being a safety-valve always at the other end in the shape of the negative factor. The only danger I have discovered was in connection with the "streams of life," which do not permit tampering with without penalty. As these exist independent of our ordinary mode of breathing, they are not apt to be interfered with by any neophyte in the pursuits now under consideration. Of these powerful streams, of which no notice has ever been taken by any one, though ceaselessly streaming into and out of our system while life lasts, I shall take occasion to speak later on. EXTIRPATION