7. However, will it not be said, you admit that a spirit can raise a table and maintain it in space without support? Isn’t that a derogation of the law of gravity? Yes, to the known law; but are all laws known? Before men had experimented with the ascending force of certain gas, who had imagined that a heavy machine, carrying several men, could soar by force of attraction? To the vulgar eye the ascent of a balloon must have appeared miraculous or diabolical. He, who had proposed a hundred years ago to transmit a dispatch five hundred leagues, and receive an answer within a few minutes, would have passed for a fool. If he had performed the feat, it would have been commonly believed that he had the Devil under his control; for then no one but the Devil was thought capable of traveling so quickly. However, now the occurrence is not only regarded as possible, but is accepted as altogether natural. Why, then, should an unknown fluid not possess the property, under given circumstances, of counterbalancing the effect of weight, as hydrogen counterbalances the weight of the balloon? An occurrence indeed, similar to that, is which takes place in the case under our notice. (See “The Mediums Book,” chap. 4).