[44] Clifford’s “Essays,” page 88.
[45] Clifford’s “Essays,” page 87. Thus the movements of Sirius led astronomers (Peters and Auwers) to infer the existence of a satellite, which was subsequently discovered by Alvan Clark & Son through the eighteen-inch glass which they were completing for the Chicago Observatory. Similarly, Professor Wright, of Oberlin, carefully studied the Trenton deposits and their relations to the terrace and gravel deposits to the westward, and predicted that similar paleolithic implements would be found in Ohio. Two years afterwards Dr. Mertz found, eight feet below the surface, a true paleolith of black flint at Madisonville, in the Little Miami Valley. Other instances of scientific prediction will occur to the reader.
[46] “Essay on the Human Understanding,” Book IV., Chapter I.
[47] Compayre’s “History of Pedagogy,” page 437, American translation.
[48] “There can be no doubt that Newton was an alchemist, and that he often labored night and day at alchemical experiments. But in trying to discover the secret by which gross metals might be rendered noble his lofty powers of deductive investigation were wholly useless. Deprived of all guiding clues, his experiments were like those of all the alchemists, purely haphazard and tentative. While his hypothetical and deductive investigations have given us a true system of the universe, and opened the way for almost all the great branches of natural philosophy, the whole results of his tentative experiments are comprehended in a few happy guesses, given in his celebrated ‘Queries.’”—Jevons’s “Principles of Science,” pages 505, 506.
[49] “The Senses and the Intellect,” pages 488-524.
[50] Max Müller’s “Science of Thought,” page 605.
[51] Page 402.
[52] Page 6.
[53] Darwin’s “Autobiography,” page 81.