These are some of the problems which Mr. Keely has had to solve before he could adapt his vibratory machinery to the etheric flow. The true conditions for transmitting it sympathetically through a differential wire of platinum and silver have now been attained, after eight years of intense study and elaborate experiment. The introductory indications began to show themselves about two years ago, but the intermissions on transmission were so frequent and so great as to discourage Mr. Keely from further research on this line. Then came one of those "inspirations" which men call "accident," revealing to him "the true conditions" necessary to produce a sympathetic flow, free of differentiation, proving conclusively the truth of his theory of the law governing the atomic triplets in their association. Differentiation, by compound negative vibration of their neutral centres, causes antagonism, and thus the great attractive power that aggregates them becomes one of dispersion or expansion, accompanied by immense velocity of rotation, which carries its influence through the whole volume of air, 230 cubic inches contained in sphere, within its 33 1/3 chord of its circle of coincidence. By this wire of platinum and silver the current of force is now passed to run the vibratory disk, thus altogether upsetting the "compressed air" theory of Professor Barker, Dr. Hall, and others of less note. "In setting the conditions of molecular sympathetic transmission by wire," writes Keely, "the same law calls for the harmonious adjustment of the thirds, to produce a non-intermittent flow of sympathy. Intermission means failure here. That differential molecular volume is required, in two different mediums of molecular density, to destroy differentiation of sympathetic flow, seems at first sight to controvert the very law established by the great Creator, which constitutes harmony--a paradoxical position which has heretofore misled physicists who have propounded and set forth most erroneous doctrines, because they have accepted the introductory conditions, discarding their sympathetic surroundings. The volume of the neutral centre of the earth is of no more magnitude than the one of a molecule: the sympathetic condition of one can be reached in the same time as the other by its coincident chord." Thus it will be seen what difficulties Keely has encountered in his persevering efforts to use the etheric flow in vibratory machinery. One by one he has conquered each, attaining the transmission of the etheric current in the same manner as the electric current, with this one notable difference--that, in order to show insulation to the sceptical, he passes the etheric current through blocks of glass in running his vibratory devices. When Keely's system is finished, then, and not until then, all that is involved in his discovery will be made known to the world. NOTE.