The amount of interest centered in the preservation of the forests of the national domain, and the establishment of forestry in the courses of several educational institutions, makes Mr. Bruncken’s ‘North American Forests and Forestry’ (Putnam & Sons) most timely. The author discusses the sociological aspects of forestry, and the distribution of forests in North America. It is of interest to note that the forest is treated as a living plant formation subject to many vicissitudes in the struggle for existence with neighboring societies of plants, particularly with the bog and prairie. The fate of the forest in front of the advancing pioneer is well delineated, and forest finance management and protection are most sensibly considered. Perhaps no other work offers the citizen such a rational presentation of all aspects of the numerous questions involved in forestry as the one under discussion. * * * * * Sachs’s ‘Physiology of Plants’ has long been a classic among botanists because of the immense amount of new results which were brought out in its pages, marking the dawn of a new epoch in the history of botanical investigation. A large share of its conclusions have become invalidated by the general advance of the subject, however, and the next most notable work, Pfeffer’s ‘Plant Physiology,’ is one which is bound to exert even a more lasting influence in the guidance and furtherance of research. The first volume issued, dealing with the metabolism and sources of energy in plants, is cyclopedic in its completeness of review of investigations in this phase of the physiology without cumbering its bibliographical lists with titles of unimportant papers. In general, subjects yet under controversy are set forth with judicial fairness, and the author has made himself familiar with the work of Russian, English and American botanists in a manner not practiced by some of his contemporaries. The translation of this work by Dr. Ewart (Clarendon Press) has given opportunity for the correction of any slight omissions in the bibliography, and the completed book must be regarded as of the greatest value not only to the botanist but to the animal physiologist who would cover the domain of that illusive subject known as “general physiology.” _ANTHROPOLOGY._