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a red solution and comes out Blue," and "Blue paper is put in a blue solution and Red," and "A Saint Patrick's comes Day Trick." Eighteen simple experiments giving tests for ten bases and three add radicals finish up with "Testing an Unknown." It seems doubtful to award a "Diploma as Amateur Analytical Chemist" for performing these eighteen experiments and doing one unknown correctly. The pamphlet will doubtless serve well the UUWose . . for which it was written. A commendable f a t u r e on the Iazt page is 3 lict of 15 well-knoxn chemistry books of a papular nature. These sbould lead the student later to a regular course in chemistry. WIJ.RELM SEGERBLOM
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the attempts to put the subject on a truly scientific basis were not very successful; extension of potentiometric methods to the study of organic oxidation-reduction systemsby Clark, Biilmann, La Mer, Conant. and others, gives a more truly scientific basis to this subject and a study of their work should precede a study of the extremely large body of experimental observations. F. 0 . RICE Exercises in General Chemistry and Qualitative Analysis. HOEACE G. DEMING AND SAW B. ARENSON.John Wiley and Sons, New York City, 1926. Second edition, revised. xii 282 pp. 13.5 X 21.5 cm. $1.80 net.
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The authors have rearranged the order of topics to conform to that in the revised Elecho-organic Chemistry. C. J. BROWedition of Deming's "General Chemistry." MAN,Associate Professor of Chemistry, Several new experiments-specially those University of Georgia, John Wiley on substances and their properties, physand Sons. Inc., New York City, 1926. ical and chemical change, and oxidationxi 381 pp. 15 X 23 cm. $5.00 reduction reactionsare welcome addinet. tions. A few quantitative exercises have Professor Brockman has done an excel- been retained, although the authors "are lent piece of work in collecting together of the orrinion that quantitative work in and systematizing the bewildering mass an elementary course often consumes time of information an the oxidation and re- that were better spent in the accumulation duction of organic compounds a t elec- of useful and necessary qualitative intrades during the process of electrolysis. formation." The section on qualitative The book deals mainly with the prepara- analysis has been definitely improved, as tive conditions for obtaining high yields the result of experience gained in two and gives copious references to the liter- years of use in many schools. ature. H. H. LLOYD We learn (p. 17) that "The oxidation of aliphatic compounds often goes to cam- Qualitative Analysis. WILLIAMC. pletion, that is to water and carbon diCOOPER,MS., Ph.D. Professor of oxide. On the other hand, the aromatic Chemistry, De Paul University, Chicompounds have a great tendency to form cago, Ill., World Book Co., Yonkers-onp h m l i c compounds which form condensa142 Hudson, New York, 1926. viii tion products of a resinous nature. In a pp. 13.5 X 20 cm. $1.52. -meat many cases the formation of resins As is customary the "bases" are conis a serious handicap to the purification of the final ~roducts. When pyridine is sidered first, then the "acids," and finally used as the solvent this trouble is usually equations are given in the back portion of the book, some being balanced while encountered." Until a very few years ago this whole others are not. No "preliminary" work branch of chemistry consisted of qualita- is included. The text in general is poorly written, tive or semi-qualitative observations and
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