200
JOURNAL OF CHE:MICAL EDUCATION
college grade and t o teachers, especially t o the younger teachers of chemistry. C. A. BRAu~ecnr
JANUARY,
1931
weights of atoms and molecules as mentioned in Chapters I1 and 111. By means of a few such determinations, i t is possible t o obtain a knowledge of the exactness of chemical changes and t o lead students t o think in terms of units of weight Chemistry and Cookerg. ANNIELOUISE of the size of the hydrogen atom or of aneMACLEOD,Ph.D., Dean of the College sixteenth the oxygen atom, which conof Home Economics, Syracuse Uni- ceptian-could nicely lead on to a discusversity, and E n r m H. NASON,Ph.D., sion of the proton as a positive unit of Professor of Foods, Syracuse University. matter. First edition, McGraw-Hill Book Co., As another example of the inclusion of 545 mare laboratory experiments, it seems Inc., New York City, 1930. xii pp., 25 figs. 14 X 20.5 cm. $3.50. probable that the study of a few more eleThe attempt t o choose from the vast ments and compounds would make the fund of chemical knowledge the principles student more familiar with the composimost useful to the student of home eco- tion of matter and the simple changes in nomics is a problem of greatinterest as well matter which go on around us. It would as one which is attended with most serious also give her a more satisfactory technic difficulties. The authors of this text in handling di5cult apparatus. It could acknowledge the difficulties and forge be recommended that the preparation of two or more colloids of a chemical nature ahead using a method of presentation based on the application of the theory of would nicely amplify the study of the general principles for making colloids menchemistry t o home economics problems. From the standpoint of the foundation tioned on page 189. After such a study principles of education, the arrangement the application of these same methods t o is sound. Though not mentioned as such, the preparation of certain foods, as menthe principles of the "unit method" are tioned on page 498, would be especially carried out especially in certain sections of valuable. the book, a few of which are mentioned as Having in mind the aim of obtainmg a fallows: the study of carbon dioxide, foundation of chemistry which will be of carbonates, and baking powder in succeed- value in later courses in home economics, ing chapters; the development of organic i t would seem that the book rather overchemistry with the following consecutive emphasizes the application of chemistry in groups: esters, oils, fats, soaps; carbo- cookery processes a t the expense of other hydrates and flour; proteins and the phases of home economics work. It is cookery of eggs and meats. I n these and most important that students who conother unit sections of the hook, the inter- tinue in many of the major lines of home est of the pupil is kept on the purpose for economics have a course in elementary which she learns the principles of chem- chemistry and in organic chemistry which istry and there is no better way t o aid will he a foundation for further chemistry the memory than by using, in various courses to meet their advanced needs. ways, the principles learned. The material of this text is uniquely The reviewer believes that certain parts planned for a very excellent course in of the first chapters could be extended t o chemistry and rookery. There is some include more chemical applications, es- question as t o whether or not i t would pecially in the laboratory work. For ex- adequately meet the requirements of the ample, a few quantitative experiments to general home economics student. show the combining relationships between NELLIEM. NAYLOR elements and t o show valence would seem IOWA STAT=C O L ~ D B AXES. IOWA to make more vivid the calculation of the
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