All of this work was accomplished within the half century after Galileo's trial, for Father Kircher died in 1680, at the age of seventy-eight, having lived, as so many of the great scientists have done, a long life in the midst of the most persistent activity. Kircher, more than perhaps any other, can be said to be the founder of modern natural science. Before any one else, in a practical way, he realized the necessity for the collection of an immense amount of data, if science was to be founded on the broad, firm foundation of observed truth. The principle which had been announced by Bacon in the "Novum Organon"--"to take all that comes rather than to choose, and to heap up rather than to register"--was never carried out as fully as by Father Kircher. As Edmund Gosse said in the June number of _Harper's_, 1904, "Bacon had started a great idea, but he had not carried it out. He is not the founder, he is the prophet {114} of modern physical science. To be in direct touch with nature, to adventure in the unexplored fields of knowledge, and to do this by carrying out an endless course of slow and sure experiments, this was the counsel of the 'Novum Organon.'" Bacon died in 1626, and scarcely more than a decade had passed before Kircher was carrying out the work thus outlined by the English philosopher in a way that was surprisingly successful, even looked at from the standpoint of our modern science. Needless to say, however, it was not because of Bacon's suggestion that he did so, for it is more than doubtful whether he knew of Bacon's writings until long after the lines of his life-work had been traced by his own inquiring spirit. The fulness of time had come. The inductive philosophy was in the air. Bacon's formulae, which the English philosopher never practically applied, and Father Kircher's assiduous collection of data, were but expressions of the spirit of the times. How faithfully the work of the first modern inductive scientist was accomplished we shall see.