precision and clearness, the kaleidoscopic phases of human existence. Only one generally known effort in the realm of Thought bears any comparison to this, examined in reference to the vigor, breadth, and variety of the mental faculties which it called into requisition. Viewed in connection with the work of the founder of the Positive School, we may say, without any disparagement to the comprehensive abilities of the French Philosopher, that the task undertaken by the English Historian required a tenacity of intellectual grasp, a steadiness of mental vision, a scope of generalizing power, an all-embracing scholarship, a marvellous accumulation of Facts, and a wonderful readiness to handle them, which even the prodigious labors of the Positive Philosophy did not demand. Comte had, indeed, like Buckle, to arrange the Facts of the universe into order. But in his case they were only to be grouped under appropriate headings, and, as it were, quietly labeled. With the author of 'Civilization in England' it was otherwise. In the _actual_ careers of men and of nations, Facts do not stand related to each other and to human actions in the distinct and distinguishable way in which they appear when correlated, as by Comte, in accordance with general Laws. The domain of the _concrete_, or of practical life, has always a variable element which does not obtain in the sphere of generalizing Principles, and which immensely complicates the investigation of the problems of real existence. Comte purposely excluded the realm of the _concrete_ from his studies, and therefore simplified, to a great extent, his field of labor. Yet even in his attempt to bring order into this curtailed department of inquiry, he professes, not merely his own inability to accomplish, but his conviction of the inherent impossibility of the accomplishment of that, for the _abstract_ only, which Buckle really undertook for the _concrete_; namely, the reduction of the Phenomena of the Universe to a single Law; or, what is synonymous, the integration of all the laws of the moral and physical world into a single Science.