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THREE:Many clerical gentlemen connected with the University had been ill-treated in the most atrocious manner. The architect Lenertz, a native of Luxemburg, also connected with the University, had been shot, for no reason at all, before the eyes of his wife at the moment that he left the house. And Louvain was so effectively cut off from the outer world that in most convents I was asked whether the rumour was true that the Pope was dead! And at that time his successor had already been appointed.Let the reader compare a hammer with a wheel and axle, inclined plane, screw, or lever, as an agent for concentrating and applying power, noting the principles of its action first, and then considering its universal use, and he will conclude that, if there is a mechanical device that comprehends distinct principles, that device is the common hammer. It seems, indeed, to be one of those provisions to meet a human necessity, and without which mechanical industry could not be carried on. In the manipulation of nearly every kind of material, the hammer is continually necessary in order to exert a force beyond what the hands may do, unaided by mechanism to multiply their force. A carpenter in driving a spike requires a force of from one to two tons; a blacksmith requires a force of from five pounds to five tons to meet the requirements of his work; a stonemason applies a force of from one hundred to one thousand pounds in driving the edge of his tools; chipping, calking, in fact nearly all mechanical operations, consist more or less in blows, such blows being the application of accumulated force expended throughout a limited distance.