the square of its time. He had only to find a value, even infinitesimal, for its attraction at any given time. A historical formula that should satisfy the conditions of the stellar universe weighed heavily on his mind; but a trifling matter like this was one in which he could look for no help from anybody,—he could look only for derision at best.
All his associates in history condemned such an attempt as futile and almost immoral,—certainly hostile to sound historical system. Adams tried it only because of its hostility to all that he had taught for history, since he started afresh from the new point that, whatever was right, all he had ever taught was wrong. He had pursued ignorance thus far with success, and had swept his mind clear of knowledge. In beginning again, from the starting point of Sir Isaac Newton, he looked about him in vain for a teacher. Few men in Washington cared to overstep the school-conventions, and the most distinguished of them, Simon Newcomb, was too sound a mathematician to treat such a scheme seriously. The greatest of Americans, judged by his rank in science, Wolcott Gibbs, never came to Washington, and Adams never enjoyed a chance to meet him. After Gibbs, one of the most distinguished was Langley of the Smithsonian, who was more accessible, to whom Adams had been much in the habit of turning whenever he wanted an outlet for his vast reservoirs of ignorance. Langley listened with outward patience to his disputatious questionings; but he too nourished a scientific passion for doubt, and sentimental attachment for its avowal. He had the physicist's heinous fault of professing to know nothing between flashes of intense perception. Like so many other great observers, Langley was not a mathematician, and like most physicists, he believed in physics. Rigidly denying himself the amusement of philosophy, which consists chiefly in suggesting unintelligible answers to insoluble problems, he still knew the problems, and liked to wander past them in a courteous temper, even bowing to them distantly as though recognising their existence though doubting their respectability. He generously let others doubt what he felt obliged to affirm; and early put into Adams's hands the Concepts of Modern Science; a volume by Judge Stallo, which had been treated for a dozen years by the schools, much as Wolcott Gibbs himself was treated, with a conspiracy of silence such as inevitably meets every revolutionary work that upsets the stock and machinery of instruction.
