In 1762, a prohibition of the Inquisition contains the title of _La petite Encyclopédie ou Dictionnaire des Philosophes, oeuvre posthume d’un de ces Messieurs_. The entry is followed by the remark “_Ridiculum acri fortius et malius plerumque secat res_. Anvers, 1761.” This title probably refers to a reprint of some portions of the encyclopaedia. Between 1758 and 1800, were placed upon the Index at intervals practically all of the works of Voltaire, but, excepting in Spanish Indexes, the term _Opera omnia_ does not appear. In 1762, the treatise by Rousseau on education, entitled _Émile_, was prohibited by the Inquisition; and in the same year, the book was ordered by the Parliament of Paris to be burned. It was also censured by the Sorbonne and prohibited for France by the Archbishop of Paris. The work was also condemned by the Protestant authorities in Geneva. In 1784, was prohibited, by a brief of Pius VI, a work issued under the title of _Recherches Philosophiques sur les Américains ou Mémoires intéressants pour servir a l’Histoire de l’Humanité_. The author was Cornelius de Paw, a canon in Zante. In 1761, the Congregation prohibits the French version of the essay by David Hume, _A Treatise on the Human Understanding_. This edition had been printed in Amsterdam in 1758, twenty years after the appearance of the original. Gibbon’s _Decline and Fall of the Roman Empire_, printed in an Italian edition in 1776, was prohibited in 1783. The writings of Thomas Paine and Joseph Priestly escaped the attention of the compilers of the Roman Index, but the name of the latter author appears in the Spanish Index of 1806. The writings of Frederick the Great of Prussia, as printed in Berlin, in 1750, under the title of _Oeuvres du Philosophe de Sans-Souci_, receive the compliment of prohibition by the Inquisition in 1760. The Spanish Index does not include the works but does find place for the _Mémoires pour servir à l’Histoire de la Maison de Brandebourg_. =25. Works on Philosophy and Natural Science, 1800–1880.=--Among the works prohibited during the period in question in the department of philosophy and natural science, may be noted the following: Villiers, Ch. de, _A Treatise on Kant_, printed in Paris in 1801, prohibited in 1817. An Italian edition of Kant’s _Critique of Pure Reason_, printed (in Rome) in 1821, prohibited in the same year. Buhle, J. G., _Geschichte der neuern Philosophie_, printed in Leipsic, 1800–1805, prohibited (in the French and Italian versions) in 1828. Tennemann, _Grundriss der Gesch. der Philosophie_, printed in Leipsic in 1812, prohibited (in the Italian version) in 1837, prohibited again (in a Polish version) in 1865. Bentham, Jeremy. Of this author practically all the works find place sooner or later in the Index, but the term _Opera omnia_ has not been used. Whately, Richard, _Elements of Logic_, printed in 1822, prohibited in 1851.