in ancient educational establishments. Youth will pay again as i t did in the great war, unless science gets decent fair play. Finally the author refers to the deluded victims of our cnriously archaic system of classical education who point to the evils of the world which they have misgoverned, and the terrible consequences of science under their misdirection as proof of the superiority of ancient culture and ideals. Saddy suggests that as a memorial we install in our universities not only a pure faculty of Art which carries an the creative work rather than the languages of our ancestors, hut also a pure faculty of Duty to foster the obligations of the twentieth century rather than the codes and creeds of mythology, ancient or feudal man. A. P. SY ~
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cult for the hStIUdor to make clear their relation to each other and to the principles involved. At the beginning of each exercise is given a list of the materials and apparatus for the experiments and following the exercise is a number of questions and problems. The hook is well written and directions are dear and concise. Explanations are included where the student could not he expected to know the results of his experiment. I n the opinion of the reviewer the hook is well suited to the purpose for which i t was intended. GEO. W. SEARS
Colloid and Capillary Chemistry. HERBERT F R E ~ N D L I Translated ~~. from the third German edition by H. Stafford Haffield. E. P. Duttan and Company, 883 pp. New York City. 1926. xv Laboratory Manual Arranged to Accompany "Principles of General Chemi~try.~' 25 X 15.5 cm. $14.00. STUARTR. BRINKLEYAND ERWINB. Professor Freundlich, in this splendid KELSEY. First edition, The Mac- work, has set up a standard to which few millan Co., New York, 1926. xiii writers in the subject may hope to attain. 159 pp. 9 figures. 14 X 21.5. $1.50. Adverse criticism of a hook, to the subject
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As the subject of this manual indicates, the experiments are arranged to accompany Brinkley's "Principles of General Chemistry" and frequent referencxs are made to this text. The suhject-matter is divided into 47 exercises of which the last 15 are inorganicpreparations. Five quantitative experiments are included among the remainder. Each exercise is divided into sections which are arranged with explanatory titles that indicate to the student what he is expected to observe. While most of the experiments are of the type usually found in laboratory manuals, the authors have grouped them in such a way that the student should not fail to see their purpose though the principle underlying them is not always so clearly pointed out. Many of them are chiefly informational, giving the student facts without showing their particular significance. This might have the effect of causing the student to look upon his chemistry as a mass of more or less unrelated facts though i t should not he diffi-
of which a writer has devoted the most of his useful life, is out of place. Even the briefest examination of Colloid and Capillary Chemistry will convince one of the soundness of this conclusion. To begin with, the arrangement is very logical and very orderly. Too many texts and reference hooks on colloid chemistry are painfully haphazard affairs. Even' the advanced student has difficulty in seeing the thread of continuity throughout colloid phenomena. Fre'mdlich's hook clears up this maze as the sunlight dispels the mist. The plan of the book is well stated in the Introduction. "The first part of the book will therefore deal with the physicochemical foundations of colloid chemistry, that is to say, with capillary chemistry. the formation and interconversion of phases, and molecular motion. Upon these three foundations colloid chemistry itself will he built up in the second part of the hook." "These three foundations" have been
