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NEW BOOKS. 567 properties, being, in Mr. Stuart-Glennie's own words, " mutually deter- mining Centres of correlatively integrating and differentiating Efforts- acting through radiating Pressures ". The skeleton of the classification is as follows : MOTION. Mathematics. Energetics. Ergatechnics. 1. Arithmetic. 1. Mechanics. 1. Mechanotechnic. 2. Algebraic. 2. Physics. 2. Dynamotechnic. 3. Tactic. 3. Organics. 3. Biototechnic. METAMORPHOSIS. Orectics. Metamorphics. Demiourgics. 1. Alogistic. 1. Kosmology. 1. Geometabolic. 2. Methodic. 2. Biology. 2. Biotometabolic. 3. Logistic. 3. Anthropology. 3. Antropometabolic. SOCIALISATION. ^Esthetics. Dikaiosynics. Kalliagogics. 1. Theamatic. 1. Economics. 1. Paidagogic. 2. Music. 2. Deontics. 2. Politagogic. 3. Dramatic. 3. Juridics. 3. Archontagogic. The exclusion of Sociology from the classification is justified by an analysis of its aims, which are discovered to be twofold, evolutional and ethical, and it falls therefore (according to its purpose) under Anthropology, "aiming at and discovering the laws of man's history," or Dikaiosynics, " aiming at and discovering the conditions of just institu- tions ". The bonds which connect Sociology as an evolutional with Sociology as an ethical science are set forth in the second paper, " The General Historical Laws, the Anthropological Bases of a Science of Socialisation". The third paper deals with " The Application of General Historical Laws to Contemporary Events," treating of history as a vast world-problem, and tracing out a certain periodicity which cannot only be discerned in the past, but may also be predicted for the future. These papers deserve careful study and attention, and even those who cannot whole-heartedly accept Mr. Glennie's philosophy will welcome its sug- gestiveness, and admire its comprehensive scope. The Key to the World's Progress. By C. S. DEVAS. Longmans, 1906. Pp. 318. " Christianity is final" (p. 57). This sentence contains the thesis of this volume, which is that whatever leads up to Christianity makes for human progress, that Christianity itself is a progress, and that apostasy from Christianity means retrogression, not in regard of the future life merely, but in respect of the best goods of man's present existence. Accord- ingly Mr. Devas distinguishes 'Fore-Christians, Christians, and After- Christians '. The Christianity which he has in view is that of the Catholic Church. In the second part of his work, called " The Course of Christianity," he deals with " ten antinomies," of which these are some : "the Church represents a religion of sorrow, yet of gladness"; "the Church appears as the State's rival, yet its ally " ; " the Church is full of scandals, yet all holy " ; " the Church upholds and yet opposes liberty of conscience" ; "the Church is ever the same and yet ever changing"; " the Church is ever being defeated and yet is ever victorious ". Under the bead of " Church Scandals " he quotes Newman's saying : " Faith is-