AUGUSTIN COCHIN, author of the work before us, is a man of a class in France from which we are specially well pleased to see vindications of Emancipation and of the policy of the Federal Union arise. His position is well and briefly stated in the preface as that of a Legitimist, a fast friend and ally of Count de Montalembert in his effort to raise up a Catholic Liberal party for the development of republican sentiments and institutions, and the ardent coadjutor of Pére Lacordaire, Monseigneur d'Orleans, Viscount de Melun, and a host of other moderate reformers in behalf of freedom. He has some little reputation as a writer on public and political topics; is highly connected, and, what is perhaps more to the purpose than aught else, is a very practical man, and son-in-law to Benoist d'Azy, who, possessed of an immense fortune, an extensive landowner and proprietor of iron forges, has done perhaps more than any other man to advance the material interests of his country by railway building, mining, and agricultural improvements. We say that this is more to the purpose, since it is of importance that the men who _actively_ employ capital should understand the falsehood of slavery as a productive force in any system of labor, anywhere, at the present day. And it is highly significant when we find such men so far enlightened in France at this time, where, although, as we learn, very advanced views in political economy are set forth, we have still apprehended that a deeply based attachment to slavery, common to all the Latin races, prevails. That the Radicals should oppose slavery is but natural, but such views among the highly cultivated aristocracy are indeed encouraging.