Tablet making

not been changed essentiallyin form. There has been added important new matter, and some of the material of the first edi- tion has been condensed wit...
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JOURNAL OF CHEMICAL EDUCATION

352 metallurgy and of many far from elementmy metallurgical problems arising in engineering practice.

based. To tbis the author very cleverly added detailed discussions of structural viscosity, the phenomenon of creep, and dilatancv. For anyone really interested in rheological problems pertaining to matter., this book iust cannot be overlooked. It -~ eert,ninlv is .. the most rontpr~hensivennd up-to-date trearise on rhnlo&, a properly uf n!:ttrcr wllirh descrvej far more attention than it has

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COLLOID CHEMISTRY

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Harry Boyer Weiser, Professor of Chemistry, The Rice Institute. Second edition. John W h y & Sons, Inc., New York, 1949. x 444 pp. 117 figs. 73 tables. 15 X 23 cm. $5.50.

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T m seoond edition of this well-known book by the author has not been changed essentially in form. There has been added important new matter, and some of the material of the &st edition has been condensed without detracting from the value of the work. In the new material added there is much tbat is related to the biological sciences, thus stressing the importance of the subject in tbis closely related field of science. In addition the value of colloid science to industry is cleady shown in the chapters on contact catalysis and dyeing. This seoond edition fulfills the threefold purpose of the author in an admirable way. Students of this baok will have obtained s good survey of the subject and its theories. The suthor emphasizes the fact that colloid science is a definite part of physical chemistry. Unfortunately there are some bad errors of proofreading with some omissions in mathematical expressions that could cause students some trouble. The book, however, should find as useful a place in the American scene as did the &st edition. L. H. REYERSON MINNEBOTA MnramPowa, MINNE~OT*

UNZVEKBITY OP

0 TABLET MAKING Arthur Little and K. A. Mitchell. The Northern Publishing Co., Ltd., 37 Victoria Street, Liverpod, England, 1949. 121 pp. 41 illustrations. 14 X 22 cm. 15s.

"TABLETMAKING''should be on the handiest shelf to every tablet production man and every development pharmacist. We a11 recogni~ethat the subject tablet manufacture is a most difficult one to cover, and that there is no substitute for experience in this work. Nevertheless, the authors have turned out an exceptionally good manual. The book is replete with examples of diffioulties and very able suggestions on possible methods of ""rrwtinn -----The fact that all the equipment described is of English make offersno difficulties. The reader will see a t once that the descriptions apply equally well to most American made maxhines. CARL J. KLEMME

Lollo & K L E M MINDOBTRTU ~ CONSUUT*NTB ST. Lorna. M~asounr

DEFORMATION AND now Markus Reiner. Professor. The Technical Colleoe. Haifa. Israel. H.K. ~ewisanddo., Ltd., london, 1949,(~nterscienck). 346 pp. 94figs. (including 23 tables). 14 X 23 om. $6.50.

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T m s book is based on a course which the suthor gave in 1945 to dlernists, and nor to an sudicnw of pbyskists. It is fnr more elemenmry and less marhcniltirwl thm his bobk. "Tan Lertures ou Tlrrorr~ivalXhnloev!' nuldishetl in 1913. 'Thy author did whole field of rheology in the present not attempt to cover volume. but his main interest was to cover the material of imoortaner to the chemist, ro whiA hr d J e d materinloiintcreat to the atrueturd or mechanical n1~itier.r. The book covers in eonsiderable drtnil the rheol0~4,i(~I phenomenn on whirh atrain, drforrnation, and flow of matter, its viscosity, plasticity, and strength are ~

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The reviewer th~rrforeis not only very hnppy to be able to revommend "Dcfonnation and Flow" wry highly to anyone r h o has at least a basic knowledcc of ehcmistrv, wlloid chcmistrv. and physics, and who would liketto expand his-&owledge so thatit also covers the rheological properties of matter; but he also feels that the author. who dedicated this baok to the memow of four rheoln-

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ENGINEERS' DICTIONARY

Louis A. Robb, Member of The American Society af Civil Engineers. b h n Wiley & Sons, Inc., New York, 1949. xvi 664 pp. 14 X 22 Em. $12.50.

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MOREcompletely "bilingual" than most foreign language dictionaries; the introductory material, including title page, preface, and list of abbreviations is in Spanish and English. Although it is scsrcely to be expected that an engineers' dictionary would cover chemical nomenclature very completely, still the coverage is better than fair. The choice is sometimes hard to justify, however. One Iinds "amino acid" and "amide," but no "amine"; "aldohexose" but neither "ketose" nor "ketone"; "peptone," "protochloride," and "nitrogen iodide," but no "aldehyde." Recent electronic and nuclear nomenclature rec~ivrsadequate attention. Ilowever. hlnnj subcnirier arc mnde undrr principnl headings, a practice which is conrcnicnt and saves snare. For imtancr, tlrera are 45 entries between "power ampl