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and embarrassments of the upper world, begin to deny this region to himself and to others, and to make it the dogma of his life, that there was but one form of sure, safe, and remunerative labor, but one unmistakable and positive good, and that was mining. We console ourselves, in view of such conclusions, with their entire falsity, and the utter impossibility of their general acceptance.

Other departments, moreover, besides philosophy, are to suffer from this rejection of the philosophical spirit. The positive sciences themselves require for their successful cultivation something beyond an observation of facts a classification of resemblances. There is ever kept hovering before the mind some idea of the causes, the concealed grounds and reasons, of phenomena; and it is these supersensual notions which guide inquiry, direct the eye, and teach it what to observe. "Without these, the classifications of science would come to little more than the child's art in grouping its bits of crockery by size or color or the conceits of fancy. It has been, for illustration, some notion of the nature of light, either as a material emanation, or a movement in a generally diffused ether, that has directed inquiry, instituted experiments, and interpreted facts. Yet there is nothing in philosophy itself more subtile, more impossible of conception, more evasive and evanescent than either of these supersensual conceptions, which have presided over this department, and resulted in most brilliant discoveries. Deny a search into intangible and inconceivable causes, causes that in their inception are purely theoretical, and we lose at once the clew of our labyrinth, and henceforth wander at chance, with no forecast of thought, through its endless passages. Another illustration is furnished by the correlation of forces. Some notion of a hidden equivalence between very diverse phenomena haunts the mind, of a concealed agreement