In the economy of nature profit and loss must balance in mechanical conditions; but Keely is not dealing with mechanical physics. There is an immense difference between vibratory physics, in which field Keely is researching, and mechanical physics. The consumption of coal to expand water for the production of steam power, in the operation of engines, cannot be compared to a force which is yielded in sympathetic vibration or by sympathetic flows. In mechanical physics, no matter what the nature of the force may be, its production must necessarily be accompanied by a corresponding expenditure of force in some form or other. The amount of force covered by a human volition cannot be measured, yet it produces the wonderful effects that are exhibited on the human frame in its overt actions. Something like this is the difference between sympathetical and mechanical force. The force of will cannot be multiplied by mechanical means, making it give pound for pound. This would annihilate both the mental and the physical, were it possible. In his researches, Mr. Keely, who is dealing entirely with VIBRATORY SYMPATHETIC and POLAR flows, is hopeless in regard to convincing the scientific world of the value of his discoveries until he has compelled its attention by commercial success. To the question, "What does the supply cost in dollars and cents, per horse-power developed?" he answers, "It costs nothing more after the machinery is made, than the vibratory concordant impulse which associates it with the polar stream." The twanging of a taut string, the agitation of a tuning-fork, as associated with the resonating condition of the sympathetic transmitter, is all that is necessary to induce the connective link, and to produce this "costless motive power." As long as the transmitter is in sympathy with the sympathetic current of the triune polar stream, the action of the sympathetic instrument or engine continues. Again, mechanical conservation of energy is one thing; sympathetic conservation is another, and we cannot expect Keely will reveal what he has discovered concerning the forces that he is dealing with until he has himself acquired that full knowledge of their action which will protect the rights of those who are interested in the "dollars and cents" part of "the enterprise."