PROTECTIVE AND DECORATIVE COATINGS, PAINTS,VARNISAES ments have been abandoned, 11 extensively modified, and 15 LacQuEns, AND INKS. Volume I. Raw Materials for Var- have been added. Among the more notable of the latter group nishes and Vehicles. Joseph 3 . Meltiello, Ph.D., Technical are photoelectric colorimeters and spcctrophotometers, distilling Director, Hilo Varnish Corporation. Editor. John Wiley and columns, the hydrophi] balance, moving boundary method for Sons, Inc., New York City, 1941. xii 819 pp. 78 figs. transference numbers, the polarograph, spectrography, and 15 X 23 cm. $6.00. Raman spectra. I t is regrettable that the old experiments on This is the first of a three-volume treatise on the subject. Vol- potentiometric titrations and indicators have been set aside, ume I1 will he devoted to pigments, and Volume I11 to manu- particularly to make place for "Exchange Reactions with Radiofacturing and special studies. The editor states that the purpose active Bromine." Since the last requires either a fair amount of the hook is t o supply basic data and information pertaining of radium, or a cyclotron, or an electrostatic generator t o produce to protective and decorative coatings, t o serve the needs of tech- neutrons, it is extremely unlikely to be used as a student experinically trained graduates who enter the industry, and t o aid ment. Modernization of a laboratory manual may be overdone. The references leave little to he desired. Typography, illusmore experienced technologists. Forty-five specialists in various branches of the subject have trations, andliterary styleare pleasing. The reviewer considers this hook one of the best of its kind. contributed as authors to the introductory survey and t o the twenty-nine chapters which comprise this volume. I n addition, I t is heartily recommended to all teachers and students. Even each chapter has been reviewed by a t least four other competent though another manual may he in actual use, this is a reference technologists. This should assure the reader that the informa- that should not be overlooked. M. M. HARING tion provided is well chosen and authentic. U N I V ~ R S ~on T YMARYLAND The introduction sketches the history, present development, COLLBOB PAR.. MARYLAND and orobable future of the oaint and varnish industrv. Dwinz * " oils are discussed in the first six chapters. Various natural and synthetic resins used in coatings are the subjects of sixteen chapWITH CONters. A chapter on driers, five chapters on solvents and thinners, TEST IT YOURSELR! CHEMISTRY EXPERIMENTS SUMER APPLICATIONS. Lawrence F. Tuleen, Willard L. Muehl, and a chapter on asphalt paints are provided. The final chapter and George 3. Porter, Instructors of Chemistry, J. Sterling Mordeals with ethylcellulose in lacquer technology. ton High School and Junior College, Cicero, Illinois. Scott. There are described in considerable detail the sources, methods Foresman and Company, Chicago, 1941. vi 290 pp. 25 of production and refining, properties, chemical reactions, and figs. 20 X 26.5 cm. $0.96. Teacher's Edition, $1.08. technical uses of various raw materials of the industrv. Tables If some morning you come staggering into your laboratory of usefuldataare presented throughout the book. with a load of ice cream cones, ice cream, afew casesof soda water. As stated in the preface, "The paint and varnish industry. has been a development of the arts, but now the industry is on coffee, headache remedies, alkalirers, and laxatives, your friends the threshold of becoming a science." One of the authors men- might infer that you were preparing for a large party with "hangovers." Another possibility is that your pupils are using these tions that a standard hook of varnish formulas was reprinted fourteen times from 1736 to 1900 with only a few minor changes, interesting items of common experience as the materials for their exercises. This laboratory manual deals and suggests that until fairly recently a chemist or engineer was T s s r IT YOURSELV! entirely with substances used personally, in the home, or in the a curiosity in the industry. The hook itself is convincing evidence of the change which has garage. The usual experiments on the preparation and properoccurred. It exhibits a gratifying effort by the various authors ties of elements and compounds are entirely omitted. The 14 units include 70 experiments grouped under the headt o interpret the behavior of the materials under discussion in terms of physical and organic chemistry. I t is apparent that ings: Measuring; Household Chemicals; Cleansers and Softthe industry is no longer satisfied t o accept its raw materials as eners; Foods; Drinks; Health; Cosmetics; Textiles; Fuels; provided by nature, but that i t will moreand more demand prod- Lubricants; Anti-freezes; Protective Coatings; Inks, Dyes, ucts modified or designed and synthesized to meet its particular and Stains; and Soils. A typical experiment consists of 4 parts: (1) preparation of the experimenter ("mind-set" is secured by requirements. (a) interesting discussion, (b) reference to 14 modern chemistry HARVEY A. NEVILLE textbooks. (6) questions); (2) experimenting to find the facts, a Lsnrox uxrveasrr~ B B T ~ & B BPBNNSYLYINIA U, process pointed toward amassing comparative data; (3) conclusions from the experiment in question form; (4) consumer apEXPERMENTAL PWSICALCHEMISTRY.FawingLon Daniels, 3 . plications in question form, frequently involving cost calculaH a r d Mathews, and John Warren Williams, Professors of tions. Chemistry, University of Wisconsin. Third Edition. McThis consumable manual is hound with rings which permit it Graw-Hill Book Company. Inc., NewYork City and London, to stay flat when folded to expose a single page. The user of the manual will need more items from the grocery and drug 1941. xvii 460pp. 121figs. 15 X 23 cm. $3.50. This hook has become so well known in its earlier editions that stores, but fewer of the staple chemicals. The directions call for little description is required. The same subdivision of material the use of minimum amounts of materials, an economy of time, is retained and discussion of each experiment follows the plan and reasoning from observations. They are expressed in clear, used previously. The framework and about two-thirds of the concise terms. No extensive extra equipment is needed. The manual has a definite place in non-college-preparatory better experimentsremain, yet the revisionis thoroughgoing. There are 72 experiments (one more than before), yet there are courses in secondary schools, for supplementary experiments in 39 less pages than in the second edition. Since the theoretical secondary schools, and'for applied chemistry in junior colleges. A teacher's edition of the manual contains a combination discussion or the descriotion of the.aooaratus or orocedure has. .. in many cases, bern considerably expanded, it is evident that manual and answer-key. This is a somewhat unusual departure sections I1 and I11 on "Apparatus" and "Miscellancaus" h a w from present-day publishing practices. Acids and bases are discussed using the theory of Arrhenius. had to be exrcnavcly abbrewat-d. Thcy are still very good. hut one senses a losing struggle to serve two m a s t e r s t o have a Interpretation of the experimental findings will in some cases refirstslass laboratory manual which is also a fairly adequate ref- auire assistance from a teacher.. but.. in eeneral. care is taken to erence book of physical chemical technics. I n section I1 the avoid having the pupil draw general conclusions from partial authors have managed t o add a bit on the electron microscope, evicfencc. Careful reading beari out the first impression--very the Tiselius cell, and isotopes. The discussions of capacity good! ELBERTC. WEAVER meamrements and ohotochemical technics are vew rood. A BOLXBLBY H I O s~c a o o ~ chapter on the use oi indicators has been added t o section I11 H n ~ ~ 1onros s a CoLLBos A comparison with the second edition shows that 14 experiH A ~ T F O R ~cor*n.wrcur ,
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