As regards odour, continues Mr. Keely, we can only get some definite idea of its extreme and wondrous tenuity by taking into consideration that a large area of atmosphere can be impregnated for a long series of years from a single grain of musk; which, if weighed after that long interval, will be found to be not appreciably diminished. The great paradox attending the flow of odorous particles is that they can be held under confinement in a glass vessel! Here is a substance of much higher tenuity than the glass that holds it, and yet it cannot escape. It is as a sieve with its meshes large enough to pass marbles, and yet holding fine sand which cannot pass through; in fact, a molecular vessel holding an atomic substance. This is a problem that would confound those who stop to recognize it. But infinitely tenuous as odour is, it holds a very crude relation to the substance of subdivision that governs a magnetic flow (a flow of sympathy, if you please to call it so). This subdivision comes next to sound, but is above sound. The action of the flow of a magnet coincides somewhat to the receiving and distributing portion of the human brain, giving off at all times a depreciating ratio of the amount received. It is a grand illustration of the control of mind over matter, which gradually depreciates the physical till dissolution takes place. The magnet on the same ratio gradually loses its power and becomes inert. If the relations that exist between mind and matter could be equated, and so held, we would live on in our physical state eternally, as there would be no physical depreciation. But this physical depreciation leads, at its terminus, to the source of a much higher development--viz., the liberation of the pure ether from the crude molecular; which in my estimation is to be much desired. Thus God moves in a simple way His wonders to perform...." When my theoretical exposé is finished and brought out, I shall be ready for the attacks that will be made upon it, and able to demonstrate what I assert. One would think that modern physicists, knowing the lesson taught by the disastrous overthrow of the primitive system of astronomy, would be somewhat cautious in reference to jeering at any announcement of scientific research, however preposterous, without first carefully weighing its claims. It is my belief that there are many to-day who occupy positions as professors in our colleges and in universities abroad, who for bigotry and ignorance can discount the opinion of the religionists of the dark ages; but those to whom has been given mental force to boldly investigate new truths in science may congratulate themselves upon the fact that there are investigators of truth who are not afraid to acknowledge its claims, in whatever garb it may appear, welcoming whatever new message it may have to deliver.... Professor Rücker, in closing his address read at the meeting of the British Association in 1891, said:--