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States," (13) " International Relations — Indian Affairs," (14) "Juris- diction of the Federal Courts," (15) "Political Questions," (16) " Enforcement of Executive Power by Judical Process."

The book is equipped with table of contents, table of cases, and index. The helpful character of the notes appended to the cases, especially the longer ones, such as that which accompanies the Dred Scott case, leads one to wish that the author had added fifty pages or more to the book, filled with matter of this kind.

A comparison of Mr. Boyd's compilation with that of Professor Thayer shows that, while the latter has incorporated a great many of the decisions of the supreme courts of the states, the former, as he states' in his preface, has limited his work to the decisions of the United States supreme court. The limited scope of Mr. Boyd's work has also obliged him to select what he considers the most important case in establishing a constitutional principle, while Professor Thayer has often been able to include several of the more important.

The bulk of the work under review is, of course, occupied with cases which time has demonstrated to be turning points in the develop- ment of our constitutional law, but later cases, such as the income tax cases and the Debs case, are also represented.

With Mr. Boyd's compilation as a text-book, Thayer's cases as a reference book, and the decisions themselves as sources, the study of constitutional law ought to become popular in our colleges and universities. C. H. Hastings.

Les Bases Sociologiques du Droit et de F^tat. Par Michel-Ange Vaccaro, Membra de I'lnstitut International de Sociologie, Directeur de la Rivista Scientifica del Diritto. Ouvrage traduit sur redition italienne, par J. Gaure, Avocat, et com- plfetement refondu. Bibliotheque Sociologique Internatio- nale, No. XI. Paris: V. Giard et E. Briere. Pp. lxi-f-480.

So FAR as form goes, Signor Vaccaro's thesis belongs side by side with Tarde's Imitation, viz.: "The ultimate law to which all others are subordinate is adaptation." The content of this thesis, as it appears in the present volume, is less positive and complete than Tarde's con- ception of what is involved in imitation. The thesis rather serves Vaccaro as a principle of discovery and a norm of classification. In those characters it is serviceable, but it has no a priori value as a con- structive rule. I do not discover that the author attaches to it any