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 love of truth for truth's sake, than the author of this History,--and few men have had a wider or more thorough knowledge of the achievements of other scientific men. Yet we are surprised, in reading this improved edition, written scarce a twelvemonth ago, to find how ignorant Dr. Whewell appears to have been of the existence or value of the contributions to knowledge made on this side the Atlantic. The chapter on Electro-Magnetism does not allude to the discoveries of Joseph Henry, in regard to induced currents, and the adaptation of varying batteries to varying circuits,--discoveries second in importance only to those of Faraday,--and which were among the direct means of leading Morse to the invention of the telegraph. The chapters on Geology do not mention Professor Hall, and only allude in a patronizing way to the labors of American geologists, and to the ease of "reducing their classification to its synonymes and equivalents in the Old World," as though the historian were not aware that Hall's nomenclature is adopted on the continent of Europe by the most eminent men in that department of science. In Geological Dynamics Dr. Whewell speaks slightingly of glacial action, and approves of Forbes's semifluid theory, in utter ignorance, it would seem, of the labors of the Swiss geologists who now honor America with their presence. The chapters on Zoology, and on Classifications of Animals, make no allusion to Agassiz's introduction of Embryology as an element in classification, which was published several years before the "close of 1856." The history of Neptune gives no hint of the fact, that its orbit was first determined through the labors of American astronomers, with all the accuracy that fifty years of observation might otherwise have been required to secure. Nor does Dr. Whewell allude to the fact, that Peirce alone has demonstrated the accuracy of Le Verrier's and Adams's computations, and shown that a planet in the place which they erroneously assigned to Neptune would produce the same perturbations of Uranus as those which Neptune produced. Much less does he allude to that wonderful demonstration by Peirce of the younger Bond's hypothesis, that the rings of Saturn are fluid; or to Peirce's remark, that the belt of the asteroids lies in the region in which the sun could most nearly sustain a ring. Yet all these points are more important than many of those which he introduces, and more to the purpose of his chapters.

Notwithstanding these deficiencies in Whewell's scholarship and in his philosophy, his History is a valuable addition to our modern literature, and gives a better sketch of the whole ground than can be found in any other single work. It is particularly valuable to those whose ordinary pursuits lead them into other fields than those of science, and we have known such to acknowledge their great obligations to these clearly written and most suggestive volumes.

_The Life of George Stephenson, Railway Engineer_. By SAMUEL SMILES. From the Fourth London Edition. Boston: Ticknor & Fields.

There is something sublime about railway engineers. But what shall we say of the pioneer of this almost superhuman profession? The world would give much to know what Vulcan, Hercules, Theseus, and other celebrities of that sort, really did in their mortal lives to win the places they now occupy in our classical dictionaries, and what sort of people they really were. But whatever they did, manifestly somebody, within a generation or two, has done something quite as memorable. Whether the world is quite awake to the fact or not, it has lately entered on a new order of ages. Formerly it hovered about shores, and built its Tyres, Venices, Amsterdams, and London only near navigable waters, because it was easier to traverse a thousand miles of fluid than a hundred miles of solid surface. Now the case is nearly reversed. The iron rail is making the continent all coast, anywhere near neighbor to everywhere, and central cities as populous as seaports. Not only is all the fertility of the earth made available, but fertility itself can be made by our new power of transportation.

Who more than other man or men has done this? Is there any chance for a new mythology? Can we make a Saturn of Solomon de Caus, who caught a prophetic glimpse of the locomotive two hundred years ago, and went to a mad-house, without going mad, because a cardinal had