“His Holiness has ordered that all patriarchs, archbishops, bishops, and other ecclesiastical dignitaries shall carefully bear in mind their responsibilities under the Rules as promulgated by the Council of Trent, together with the additions to the same which were published by Clement VIII, Alexander VIII, and Benedict XIV. It is evidently impossible to bring into the Index the titles of all publications appearing from year to year which are pernicious in character or dangerous in doctrine. It is no longer practicable to apply the authority of the Church through prohibitions of specific books or cautions as to these, to prevent the faithful from being injured by such pernicious literature. The Church authorities must therefore issue general instructions based upon the Index Rules, by means of which instructions, the faith of believers can be protected against heresy and demoralisation.” The second is a _monitum_ of the Congregation of the Index, dated March 4, 1828. The Congregation enjoins upon all patriarchs, archbishops, bishops, confessors, and local inquisitors the importance of making thorough application of the provision of the second of the Tridentine Rules: “Works by heretics which have to do with religious or theological subjects are prohibited without reservation.” The _monitum_ makes reference also to the instruction of Clement VIII: “All works which are prohibited by the Holy See in the original text are also forbidden in all translations of the same.” In the Index of 1841, was included a _monitum_ concerning translations into the vernacular of the Scriptures. In the Index of 1877, was included a statement concerning the modification of the penalties that had been prescribed under the Bull of 1869, and also a declaration concerning books on the doctrine of the Immaculate Conception. In May, 1844, Gregory XVI had included in an encyclical a _monitum_ cautioning all believers to guard themselves not only against the reading of all books prohibited by title, but against the use or the influence of any literature belonging to the classes which are condemned and prohibited under the general instructions of the Index. This _monitum_ of Gregory’s was, however, not itself reprinted in any of the succeeding Indexes. The _Decreta Generalia_ have received no additions since the time of Benedict. A number of general prohibitions have, however, been issued which are analogous in their character and authority to the _Decreta_. These are printed in the text of the Index proper and, in certain cases, under headings where they would hardly be looked for. Some of them are entered under _libri_ (_omnes incredulorum_); the prohibition of books on spiritualism is entered under the term “matter.” Some of these general prohibitions, such as that of the writings of the Carbonari, escaped being repeated in any of the Indexes.