"But why does not Keely share his knowledge with others?" "Why does he not proclaim his secret to the world?" are questions that are often asked. Keely has no secret to proclaim to the world. Not until the aerial ship is in operation will the world be able to comprehend the nature of Keely's discoveries. When the distinguished physicist, Professor Dewar, of the Royal Institution of Great Britain, goes to America this summer, he will be instructed by Mr. Keely in his dissociation processes. Every man who has passed the mere threshold of science ought to be aware that it is quite possible to be in possession of a series of facts long before he is capable of giving a rational and satisfactory explanation of them--in short, before he is enabled to discover their causes even. This "dead-work" has occupied many years of Keely's life; and only within the last five years has he reached that degree of perfection which warranted the erection of a scaffolding for the construction of the true edifice of philosophy. We have only to recall the wonderful discoveries which have been made in modern times, relative to the properties of heat, of electricity, of galvanism, etc., in order to acknowledge that had any man ventured to anticipate the powers and uses of the steam-engine, the voltaic pile, the electrical battery, or of any other of those mighty instruments by means of which the mind of man has acquired so vast a dominion over the world of matter, he would probably have been considered a visionary; and had he been able to exhibit the effects of any of these instruments, before the principles which regulate their action had become generally known to philosophers, they would in all likelihood have been attributed to fraud or to juggling. Herein lies the secret of Keely's delay. His work is not yet completed to that point where he can cease experimenting and publish the results of his "dead-work" to the world. "When will he be ready?" is a question often asked; but it is one that God only can answer, as to the year and day. It now seems as if the time were near at hand,--within this very year; but not even Keely himself can fix the date, until he has finished his present course of experiments, his "graduation" of his twenty-seventh and last group of depolar disks, for effecting change and interchange with polar force.