of sand to the size of the sun, brought to bear upon it would not make its structure visible to us; and that, light traversing space at the speed of two hundred thousand miles per second, a distance requiring light a thousand centuries to reach would be traversed by the etheric flow in an indefinite fragment of a second. 11th. Keely has given such proof of genius as should bring all scientists who approach him into that attitude of mind which would lead them to receive without prejudice the evidence of the truth of the claims he offers. Genius has been defined as an extraordinary power of synthetic creation. Another definition of the man of genius is, the man who unceasingly cultivates and perfects such great natural aptitudes and facilities as he has been endowed with at his birth. No man has ever lived on this earth who, according to these qualifications, so deserved to be known and acknowledged as a man of genius as John Worrell Keely. History will determine whether he is a man of genius or "a charlatan," as some scientists still persist in calling him. It is easier, as has been said, to accuse a man of fraud than to account for unknown phenomena. A system of doctrine can be legitimately refuted only upon its own principles, viz., by disproving its facts and invalidating the principles deduced from them. Abercrombie said that the necessary caution which preserves us from credulity should not be allowed to engender scepticism,--that both of these extremes are equally unworthy of a mind which devotes itself with candour to the discovery of truth. "We must not decide that a thing is impossible," says Lebrun, "because of the common belief that it cannot exist; for the opinion of man cannot set limits to the operations of Nature, nor to the power of the Almighty. He who attempts to hold up to contempt a scientific subject of which he is profoundly ignorant has but small pretensions to the character of a philosopher." Galileo said, after pronouncing his abjuration, "E pur si muove" ("But it does move"). What signified to him the opinion of men, when Nature confirmed his discovery? Of what value were their prejudices or their wisdom in opposition to her immutable laws? Kedzie, speculating upon the nature of force, writes, "Molecules and masses act precisely as they are acted on; they are governed by the iron instead of the golden rule. They do unto others as others have done unto them. Whence comes this energy? Not from atoms, but from the Creator, in the beginning." The Duke of Argyll says, "We know nothing of the ultimate seat of force. Science, in the modern doctrine of the conservation of energy and the convertibility of forces, is already getting something like a firm hold of the idea that all kinds of forces are but forms or manifestations of some one central force, arising from one fountain-head of power."