good acquaintance with philosophical history and opinion, and gave sign in this direction, as in so many others, of a far-reaching intellect. As in almost all his works, however, the value of the thought is extremely unequal, while the different pieces, always written in the hottest haste, and never duly matured or corrected, present but few specimens of finished and polished writing. Charles Bonnet (1720-1793), a Swiss of Geneva, wrote a large number of works, many of which are purely scientific. Others, however, are more psychological, and these, though advocating the materialistic philosophy generally in vogue, were remarkable for uniting materialism with an honest adherence to Christianity. The half mystical writer, Louis Claude de Saint-Martin (1743-1803) also deserves notice. But the French metaphysician of the century is undoubtedly Etienne Bonnot, abbe de Condillac (1714-1780), almost the only writer of the time in France who succeeded in keeping strictly to philosophy without attempting to pursue his system to its results in ethics, politics and theology. In the _Traite des sensations_, the _Essai sur l'origine des connaissances humaines_ and other works Condillac elaborated and continued the imperfect sensationalism of Locke. As his philosophical view, though perhaps more restricted, was far more direct, consecutive and uncompromising than that of the Englishman, so his style greatly exceeded Locke's in clearness and elegance and as a good medium of philosophical expression. Voltaire (theology). The "System of Nature." Chamfort. Rivarol.