ABSTRACT PROFS. BARKER AND YOUNG have done well to collect the laboratory exercises which for the past ten years have been in use in the College of Agriculture of the University of Nebraska.

In this region, where soil physics is so important, one may feel reasonably certain that survival for ten years is a sound test of value, and therefore teachers who are trying to introduce

the subject into their courses will welcome the book. _A Manual of Soil Physics_. By Prof. P. B. Barker Prof. H. J. Young. Pp. vi + 101. (London: Ginn and Co., 1915.) Price 3_s_. ARTICLE PDF

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