Newton was indebted to Gilbert for his discovery of the so-called law of gravitation. Keely defines gravity as transmittive inter-etheric force under immense etheric vibration, and electricity as a certain form of atomic vibration. When Gilbert, court-physician to Queen Elizabeth, announced his discovery of electricity, he was asked by his compeers of what use it was. No one dreamed then of it as a motive power. He replied, "Of what use is a baby? It may develop into a man or a woman, and, although we cannot make any use of electricity now, the world may in time find out uses for it." Just as little understood would Keely's writings be now on sympathetic negative attraction as were Gilbert's writings then on electricity and magnetism. Men found no sense in the words "electric" and "electricity," although derived from the Greek root for amber. The same fault is found with Keely for coining new words which no one understands. "Every branch of science, every doctrine of extensive application, has had its alphabet, its rudiments, its grammar: at each fresh step in the path of discovery the researcher has had to work out by experiment the unknown laws which govern his discovery." To attempt to introduce "the world"--even scientists--to any new system without previous preparation would be like giving a Persian book to a man to read who knew nothing of the language. As has been said, we do not expect a complicated problem in the higher mathematical analysis to be solved by one who is ignorant of the elementary rules of arithmetic. Just as useless would it be to expect every scientist to comprehend the laws of etheric physics and etheric philosophy after having witnessed Keely's experiments. The requirement of every demonstration is that it shall give sufficient proof of the truth that it asserts. A demonstration which does less than this cannot be relied upon, and no demonstration ever made has done more. The success of a demonstration is in proportion as the means applied are adequate or inadequate. As different principles exist in various forms of matter, it is quite impossible to demonstrate every truth by the same means or the same principles. It is only the prejudice of ignorance which exacts that every demonstration shall be given by a prescribed canon of science; as if the science of the present were thoroughly conversant with every principle that exists in nature. Yet physicists exact this, though they must know its inadequacy.