This Bibliography of the Boston Public Library is a case in point. A collection of works relating to the physical history, the origins, migrations, and languages of the peoples of Europe is indicated upon its shelves, in all probability, we venture to predict, superior to any single one existing in Europe. This startling statement is based upon several considerations familiar to any specialist. Scientific book materials are of two classes. The first are the expensive and compendious volumes, generally to be found in great libraries, although oftentimes the paucity of their scientific collections is very surprising, especially in all that concerns the newer sciences of biology, anthropology, and the like. The second order of publications, often rarer and scientifically more valuable than the first, are the scattered monographs or pamphlets published in all manner of forms and by societies, oftentimes ephemeral and of all degrees of eminence. This second class of materials is generally richly represented in the collections of the various scientific societies, especially in the form of reprints presented by the authors. But the great and expensive tomes are seldom thus presented, and the societies can seldom afford to purchase them. Thus it comes about that these two classes of raw materials have to be separately hunted down, being rarely found together. For example, the library of the Société d'Anthropologie at Paris, judging by its printed catalogues, while abounding in scattered monographs and reprints, contains very few of the expensive volumes. One must seek these, and if they be in English or German, very likely in vain, in the Bibliothèque Nationale. The Public Library of the city of Boston has apparently tried an experiment in this direction, and is certainly to be congratulated upon the result. To a very rich collection of standard works has been added, by co-operation with a special investigator, a large part of the _flotsam_ and _jetsam_ which is of such extreme value to the student of original sources. The library has set a worthy example of encouragement to research; it has offered definite proof of the ability of our American institutions to rival their European contemporaries. And a peculiarly appropriate rounding-out to the successful career in the distinctively popular phases of administration of the institution of the late librarian, Mr. Herbert Putnam, is afforded in this work, the last at Boston officially, perhaps, to bear his signature and the stamp of his approval. _OUR RACE TROUBLES._