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B O O K S

For Electro- and Nonelectro Chemists The Encyclopedia of Electrochemistry.

CLIFFORD A. H A M P E L (consulting chemical engineer), editor, xviii -f-1206 pages. Reinhold Publishing Corp., 430 Park Ave., New York, N.Y. 10022. 1964. $35. Re­viewed by Dr. H. A. Laitinen.

Dr. Laitinen is head of the division of analytical chemistry, department of chemistry, University of Illinois, Ur-bana.

An encyclopedia article is typically written by a research specialist and addressed to the general reader or nonspecialist. It might therefore ap­pear that an Encyclopedia of Electro­chemistry would be mainly of inter­est to nonelectrochemists. So vast is the breadth of the field, and so com­prehensive is the coverage of this book, that even (and perhaps especially) the electrochemist will benefit greatly from browsing through many of the 412 individual articles in this book that lie outside of his specialty.

The scope is best described as in­cluding the activities of the various divisions of the Electrochemical So­ciety plus a number of biographical sketches and articles on electrochem­istry in biology and medicine. The latter articles are particularly recom­mended as an introduction to these fields. The exceptional coverage of polarography is noteworthy in view of the tendency to overlook or mini­mize this field in some electrochemical compilations.

Naturally, in a compendium of con­tributions from 271 authors, there are bound to be inconsistencies. Some of these are to be expected and even encouraged as reflecting different viewpoints, but others might better have been ironed out in the editorial process. For example, the symbols e, er and e are used for the electron, and AG and AF are used for the Gibbs function in various articles. A glos­sary of symbols would have been helpful.

There is a laudable attempt to em­ploy the IUPAC convention for elec­trode potentials, but unfortunately without complete uniformity. In the principal article "Electrode Poten­

tials" by A. J. de Bethune and N. A. S. Loud (available as a separate 19-page reprint at $1.95) the standard poten­tials and temperature coefficients of 467 half-reactions involving 90 ele­ments are listed. These are written as oxidation half-reactions with po­tentials V° having signs corresponding to the electrostatic charge of the metal phase. This reviewer would have preferred to see the half-reactions written as reduction processes. In an article "Electromotive Series" by J. V. Petrocelli, there is a shorter table of "oxidation potentials" written as oxidation half-reactions with the sym­bol E0°x having a sign opposite to V. This reviewer would have preferred to rescue the term "potential" for V. In an article "Electromotive Force and Half-Cell Potentials" by M. H. Lietzke and R. W. Stoughton there is another exposition on conventions, with the terminology E°x = — E ^ d = V°; and in an article "Potential-pH Diagrams" by M. Pourbaix, E£ is described as the "standard equilibrium potential" written for an anodic half-reaction with the sign of V.

Some duplication of material was noted, e.g., the same family of weak and titration curves appears on page 8 under "Acidimetry and Alkalimetry" and on page 903 under "pH Titration Curves." In general, however, the quality of editing is exceptional, and very few typographical errors were noted. Although its price may put this volume out of the reach of many individual readers, it is highly recom­mended for the technical library.

BRIEFS

Molecular Pharmacology is the name of a new international journal which began publication in July. Issued by the American Society for Pharma­cology and Experimental Therapeutics, it will contain results of investigations that elucidate mechanisms of drug ac­tion or of toxicity at the molecular level. Volume 1, 1965, three issues, will cost $11 for institutional subscrib­ers; $5.00 for private subscribers. Volume 2, 1966, which will be six issues, will be twice as much. Send subscriptions to Academic Press, Inc., I l l Fifth Ave., New York, N.Y. 10003.

82 C & E N S E P T . 13, 1 9 6 5

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Peaceful Uses of Atomic Energy is the topic of the proceedings of the third international conference called by the United Nations in Geneva in 1964. The proceedings are being published in a single, multilingual edition of 16 volumes. All papers, documents, and discussions are in English or are followed by abstracts in English. The entire series costs $192.50 if ordered by individual volumes at $12.50 apiece (except Vol. XVI, which is $5.00), but a 10% discount is offered for the entire series, or $173.25. For further details write National Agency for International Publications, Inc., 317 East 34th St., New York, N.Y. 10016.

Institute of Food Science and Tech­nology proposes to publish a new journal called Journal of Food Tech­nology. The institute at present pub­lishes a newsletter, and it is intended to expand this so that book reviews and articles expressing opinions on current activities and trends in the food industry, insofar as they affect food science and technology, can be published in it. It will not compete with existing scientific or trade jour­nals, but will fill a need not otherwise covered for publishing papers dealing with development and application, or food technology. It will contain mainly original papers plus authorita­tive reviews on recent advances in food science and technology. The in­stitute hopes to publish the first num­ber at the beginning of 1966 and there­after to issue three numbers a year. W. B. Adam, George & Dragon Cot­tage, Chipping Campden, Gloucester­shire, England, is editor.

lUPAC's Commission on Nomencla­ture of Inorganic Chemistry drafted a set of tentative rules for naming coordination compounds at the In­ternational Union's XXIIIrd Confer­ence held in Paris in July. A revision of the 1957 rules was also adopted. The rules will be published in the Comptes Rendus of the conference and will remain tentative for a year to allow for possible criticism.

The First USP XVIII Supplement, to be issued in 1966, will contain the text of the First Interim Revision Announcement. It will include re­visions of 21 USP XVII monographs,

Commercial ly avai lable D I B A L - H (diisobutylaluminum hydride) has rapidly gained widespread accept­ance as an o u t s t a n d i n g selective r e d u c i n g a g e n t for i n - p l a n t and laboratory syntheses. Less expensive on a reducing equivalency basis than most competitive materials, D I B A L - H is also more convenient since it is a liquid, soluble in most hydrocarbons. D I B A L - H can be handled readily and safely in the pure state with the proper precaut ions . . . or purchased as a solution in toluene or hexane, quan­ti tatively assayed and ready for use.

D I B A L - H is particularly useful for the selective reduction of carbon-oxygen and carbon-nitrogen unsatu-ration. Under controlled conditions, nitriles, esters and acids can be par­tially reduced to the corresponding aldehyde, or more completely to the alcohol. S t r u c t u r a l va r i a t ions and stereohindrance have minimal effect on reaction yields.

Return the coupon below for bul­letin on D I B A L - H . . . or for a show­ing of a 30-minute, 16-mm, sound, color film on the safe handling of Aluminum Alkyls.

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representing corrections of text or modifications designed to improve the procedures. Copies of the first an­nouncement are available on request from U.S. Pharmacopeia, 46 Park Ave., New York, N.Y. 10016.

InterDok Corp. has been formed to serve the fields of science, engineering, and technology. Its medium for dis­semination of information is the Direc­tory of Published Proceedings, a monthly compilation of currently pub­lished proceedings of scientific and technical meetings, symposiums, and congresses on a national as well as international basis. InterDok will also make available a centralized acquisi­tions service for proceedings cited. Annual subscription rate is $38 for North America and $48 elsewhere. Write InterDok, 6 Kenneth Rd., White Plains, N.Y.

Atmospheric Emissions from Sulfuric Acid Manufacturing Processes is the title of a cooperative study project of Manufacturing Chemists' Association and Public Health Service. The 107-page paperbound book (PHS Publi­cation No. 999-AP-13) is available on request from the Publications Office, Robert A. Taft Sanitary Engineering Center, Cincinnati, Ohio 45226.

NEW BOOKS

Advances in Cryogenic Engineering. Vol. 10. (Sections A-L). K. D. TIM-MERHAUS, editor, xi -{- 513 pages. Plenum Press, 227 West 17th St., New York, N.Y. 10011. 1965, $17.50.

Contains 62 of the papers presented at the 10th National Cryogenic Engineer­ing Conference, August 1964, at Uni­versity of Pennsylvania. Annual Review of Plant Physiology.

Vol. 16. LEONARD MACHLIS, WINSLOW R. BRIGGS, editors, viii -f- 493 pages. Annual Reviews, Inc., Palo Alto, Calif. 1965. $8.50.

Atlas of Steroid Spectra. WALTER NEU-DERT, HORST ROPKE. viii 4- 471 pages. Springer-Verlag, New York, Inc., 175 Fifth Ave., New York, N.Y. 10010. 1965. $36.

A collection of 1100 steroid spectra for use in identifying and determining con­stitution of steroids. Includes spectra catalog and code and compound indexes. Boron-Nitrogen Compounds. KURT

NIEDENZU, JOHN W. DAWSON, viii 4-175 pages. Academic Press, Inc., I l l Fifth Ave., New York, N.Y. 10003. 1965. $6.75.

Explores general characteristics of struc­ture and principles involved in prepara­tion and reactions of boron-nitrogen com­pounds.

84 C & Ε Ν S Ε Ρ Τ. 1 3, 19 6 5

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In polyolefin and stereo rubber manufacture, Isopar is boosting catalyst life and activity, giving greater polymer yield, because it's so free from olefinic im­purities and trace contaminates. And selected grades have FDA permission in food-related and certain direct food uses.

In organosols, Isopar is giving better control over dispersion viscosity . . . improving viscosity stability . . . facilitating application.

In rubber adhesives, Isopar is reducing solvent consumption, speeding solvent release, reducing heat requirements, giving lower solution viscosities.

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In cosmetics, Isopar ends problems of greasiness; gives hair preparations better manageability, cleansing creams greater cleansing action, and foundation makeup a more natural matte finish.

In aerosols, shoe polishes, household dry cleaner, photocopy developer, in chlorination processes . . . but that's why we use the infinity sign with Isopar. Get the full story about Isopar in your field from our local Solvents Representative — over a good cigar. Or, if you prefer, write to our Solvents Sales Department in Houston, Texas.

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contribute to squeezing value out of throw-aways. Fair refining charges and a policy of basing values on mutually acceptable assays are only a few of the advantages of Engelhard's refining service. Recovered precious metals can be purchased by Engelhard or returned to you in whatever form you need. As another convenience, Engelhard maintains "Pool Accounts", whereby the recovered precious metal content of your waste material is credited to the drawing account of your company for fabrication or other purposes. Write or call Engelhard today. We'll be glad to send an Engelhard Technical Service Representative to help you initiate a scrap-recovery program, or to solve any current recovery, separation, or transportation problem.

86 C & Ε Ν

Other

products serving the chemical industry

PRECIOUS METAL CATALYSTS are available in all forms for production of heavy chemicals, petroleum prod­ucts, plastics, textiles and fine phar­maceuticals. Engelhard supplies cat­alysts to specification for large-scale reactions or in laboratory quantities.

FUSED QUARTZ is manufactured and fabricated in special shapes and sizes for all applications . . . standard ap­paratus, tubing, and piping up to 25" in diameter. Amersil® ingots and plates are available in commercial quality, clear, opaque, and special optical grades.

GENERATORS FOR PRODUCTION OF N2 H2 GAS offer an economical, in-plant method for production of high­est-purity nitrogen. Unit supplies up to 10,000 c.f.h. of gas with less than 1 ppm of oxygen, and controllable hydrogen content of 0.5% to 2 5 % . Can cut production costs by 3 0 % .

RUPTURE DISCS of precious metals are guaranteed to burst at ± 5 % of specified pressure. Made of gold, sil­ver or platinum, they are ideal for pressurized apparatus subject to cor­rosive atmospheres which would ren­der base metals useless.

PLATINUM-CLAD MATERIALS combine superior electrical and physical prop­erties with the low cost of base metals. Pure or alloyed platinum is securely bonded to wire, sheet or tubing in a continuous, pore-free clad to your specified gauge.

Chromatographic Reviews. Vol. 7. MICHAEL LEDERER, editor, viii + 202 pages. American Elsevier Publishing Co., Inc., 52 Vanderbilt Ave., New York, N.Y. 10017. 1965. $11.50.

Progress in chromatography, electrophore­sis, and related methods.

Flame Structure. R. M. FRISTROM, A. A. WESTENBERG. xiii -}- 424 pages. Mc-graw-Hill Book Co., 330 West 42nd St., New York, N.Y. 10036. 1965. $17.50.

Purpose of book is to bring together in one volume the information and tech­niques developed for the detailed study of flames and the main results so far obtained.

Fundamentals of Carbanion Chemistry. DONALD J. CRAM, viii + 289 pages. Academic Press, Inc., I l l Fifth Ave., New York, N.Y. 10003. 1965. $9.50.

Volume 4 of a series of monographs on or­ganic chemistry.

Handbuch der Raumexplosionen. H E I N Z H E L M U T H FREYTAG. xxxi + 664 pages. Verlag Chemie, GmbH, Postfach 149, 17a Weinheim/Bergstr., Germany. 1965. D M 6 8 .

High Resolution Spectra of Inorganics and Related Compounds. Vols. 1, 2. 600 spectra -f preface and indexes. Sadtler Research Laboratories, Inc., 3314 Spring Garden St., Philadelphia, Pa. 19104. 1965. $135 to universities and $160 to industry.

Looseleaf.

High-Temperature Compounds of Rare Earth Metals with Nonmetals. GRIG-ORII VALENTINOVICH SAMSONOV. xiii + 280 pages. Consultants Bureau En­terprises, Inc., 227 West 17th St., New York, N.Y. 10011. 1965. $17.50.

Soviet research scientist assembles (said to be for the first t ime) data on little-studied class of refractory and hard com­pounds of rare earth metals.

How to Use the Learning Curve. RAY­MOND JORDAN, vi + 321 pages. Ma­terials Management Institute, 221 Co­lumbus Ave., Boston, Mass. 02116. 1965. $14.95.

International Advances in Cryogenic En­gineering. Vol. 10 (Sections M-U) . xi + 427 pages. Plenum Press, 227 West 17th St., New York, N.Y. 10011. 1965. $17.50.

Contains 42 of the papers presented at the 10th National Cryogenic Engineering Conference, August 1964 at University of Pennsylvania.

Introduction to Stereochemistry. KURT MISLOW. xii -\- 193 pages. W. A. Benjamin, Inc., One Park Ave., New York, N.Y. 10016. 1965. Cloth, $8.50; paperback, $3.95.

Text-monograph, one of the Organic Chemistry Monograph Series, gives brief introduction for advanced undergraduates and first-year graduate students.

Ionic Aliphatic Reactions. W I L L I A M H. SAUNDERS, JR. xiii 4 - 1 1 3 pages. Pren­tice-Hall, Inc., Englewood Cliffs, N.J. 07632. 1965. Cloth, $4.50; paper, $1.95.

One of a series on Foundations of Modern Organic Chemistry, this is an elementary volume.

Magic With Chemistry. EDWARD L. PALDER. 92 pages. Grosset & Dunlop, Inc., 1107 Broadway, New York, N.Y. 10010. 1964, $2.95.

Mystery experiments and demonstrations for science clubs, classes, and entertain­ment programs.

Metal Statistics 1965. 58th ed. 800 pages. American Metal Market, 525 42nd St., New York, N.Y. 10036. 1965. $5.00.

Metallkundliche Analyse. W A L T E R KOCH. 497 pages. Verlag Stahleisen m.b.H., Postfach 8229, Dusseldorf, Germany. 1965. D M 1 3 5 .

Methods of Soil Analysis. Part 1 : Physi­cal and Mineralogical Properties, In­cluding Statistics of Measurement and Sampling; Part 2: Chemical and Microbiological Properties. C. A. BLACK, editor-in-chief. Part 1, lxii + 770 pages; Part 2, lxii + 802 pages. American Society of Agronomy, 677 South Segoe Road, Madison, Wis. 53711. 1965. $30 set; $17.50 per single part.

Nuclear Chemistry. BERNARD G. HARVEY. viii -f- 120 pages. Prentice-Hall, Inc., Englewood Cliffs, N.J. 07632. 1965. $1.95 paper; $3.95 cloth.

Said to cover true substance of nuclear science, with introduction to it on a non-mathematical level.

The Oligosaccharides. JAROSLAV STANEK, MILOSLAV CERNY, JOSEF PACAK. 567 pages. Academic Press, Inc., I l l Fifth Ave., New York, N.Y. 10003. 1965. $21.

Newly revised and translated from Czech.

Pharmacology and Therapeutics. 3rd ed. RUTH D. MUSSER, BETTY Lou SHUB-KAGEL. xvi -}- 878 pages. Macmillan Co., 60 Fifth Ave., New York 11, N.Y. 1965. $7.95.

Practical, comprehensive, and current text­book especially adaptable to clinical nurs­ing courses.

Photoelectronic Materials and Devices. SIMON LARACH, editor. xi + 434 pages. D. Van Nostrand Co., Inc., 120 Alexander St., Princeton, N.J. 1965. $12.

Covers interrelationships between light and electrical energy. Said to be of in­terest to those working in physics, solid-state chemistry, and electronics.

Practical Instrumental Analysis. J. KRU-GERS, A. I. M. KEULEMANS. ix + 263 pages. American Elsevier Publishing Co., Inc., 52 Vanderbilt Ave., New York, N.Y. 10017. 1965. $11.

An introduction to a subject which is established as an addition to and a con­tinuation of classical analytical chemistry.

Progress in Dielectrics. Vol. 6. J. B. BERKS, J. H A R T , editors, vii -\- 334 pages. Academic Press, Inc., I l l Fifth Ave., New York, N.Y. 10003. 1965. $14.50.

Progress in Experimental Tumor Re­search. Vol. 6. F . HOMBURGER, editor, xi + 338 pages. Hafner Publishing Co., 31 East 10th St., New York 3, N.Y. 1965. $22.25.

Authors of this volume, from all over the world, present range of approaches from fundamental to thoroughly practical.

Radiation Preservation of Foods. 424 pages. Printing and Publishing Office, National Academy of Sciences—Na­tional Research Council, Washington, D.C. 20418. 1965. $9.00.

Proceedings of international conference in Boston, September 1964.

S E P T . 13f 1965 C & E N 87

I N D U S T R I E S , I N C .

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Radiochemical Methods of Analysis. IAEA. Vol. I, 433 pages; Vol. II, 522 pages. National Agency for Interna­tional Publications, Inc., 317 East 34th St., New York, N.Y. 10016. 1965. Vol. I, $9.00; Vol. II, $11.

Proceedings of IAEA Symposium, Salz­burg, Austria, October 1964.

Rodd's Chemistry of Carbon Compounds. Vol. I, Part C: Monocarbonyl Deriv­atives of Aliphatic Hydrocarbons; Their Analogues and Derivatives. 2nd ed. American Elsevier Publishing Co., Inc., 52 Vanderbilt Ave., New York 17, N.Y. 1965. $27.

The Scientific Community. W A R R E N O. HAGSTROM. χ + 304 pages. Basic Books, Inc., 404 Park Ave. South, New York, N.Y. 10016. 1965. $5.50.

Said to be the first comprehensive socio­logical portrait of community of scientists which influences directions and guidance of research.

SOCMA Handbook: Commercial Or­ganic Chemical Names. 1033 pages. Special Issues Sales, American Chemical Society, 1155 Sixteenth St., N.W., Washington, D C . 20036. 1965. $25.

Tall Oil and Its Uses, vi + 136 pages. Pulp Chemicals Association, 60 East 42nd St., New York, N.Y. 10017. 1965. $3.50.

Information collected from many repre­sentatives of member companies of tall oil products division of PCA.

Technical Information Center Adminis­tration. ARTHUR W. ELIAS, editor, vi + 171 pages. Spartan Books, Inc., 1250 Connecticut Ave., N.W.. Wash­ington, D C . 20036. 1965. $6.75.

Proceedings of Technical Information Center conference, Philadelphia, June 1964.

The Theory and Practice of Scintillation Counting. J. B. BIRKS. XX -f 662 pages. Pergamon Press Inc., 44-01 21st St., Long Island City, N.Y. 11101. 1964. $17.50.

Comprehensive account of widely used and versatile technique for detection and measurement of ionizing radiations. Said to be of great value to physicists, chem­ists, nuclear technologists, biological and medical scientists, and all other users of ionizing radiation.

Transitional Elements. EDWIN M. LAR-SEN. xi + 183 pages. W. A. Ben­jamin, Inc., One Park Ave., New York, N.Y. 10016. 1965. Cloth $4.95; paper $2.45.

Text-supplement presents account of de­scriptive chemistry of transitional ele­ments for students of basic chemistry.

University Chemistry. BRUCE H. MAHAN. xii + 660 pages. Addison-Wesley Pub­lishing Co., Inc., Reading, Mass. 1965. $8.95.

General chemistry text for serious student of science including biology, engineering, and premedicine majors, as well as physics and chemistry.

Weed Control Handbook. 4th ed. Ε. Κ. WOODFORD, S. A. EVANS, editors, xv + 434 pages. F. A. Davis Co., 1914 Cherry St., Philadelphia, Pa. 19103. 1965. $6.50.

Issued by the British Weed Control Coun­cil.

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Adhesive Materials: Their Properties and Usage. Supplements. Vol. 1, No. 1. IRVING KATZ. viii + 60 pages. Foster Publishing Co., 1602 Pattiz Ave., Long Beach, Calif. 90815. 1965. $20 per year for 4 numbers.

American Bureau of Metal Statistics Year Book. 1964. 146 pages. American Bureau of Metal Statistics, 50 Broad­way, New York, N.Y. 10004. 1965. Cloth, $4.50; paper, $4.00.

Basic Facts of College Chemistry. A L ­FRED VOGEL. v -f- 59 pages. Macmil-lan Co., 60 Fifth Ave., New York 11, N.Y. 1965. 95 cents.

Bibliography of Publications Dealing with the Polarographic Method in 1960. JAROSLAV HEYROVSKY. 101 pages. Ceskoslovenska akademie ved, Prague, Czechoslovakia. 1962. Cena broz. Kcs. 6.50.

Bibliography of Publications Dealing with the Polarographic Method in 1961. JAROSLAV HEYROVSKY. 89 pages. Ceskoslovenska akademie ved, Prague. Czechslovakia. 1963. Cena broz. Kcs 6.50.

Bibliography of Publications Dealing with the Polarographic Method in 1962. JAROSLAV HEYROVSKY. 131 pages. Ceskoslovenka akademie ved. Prague, Czechoslovakia. 1964. Cena broz. Kcs 10.

Chemicals from Ethylene. 1965. M A R ­SHALL SITTIG. 115 pages. Noyes De­velopment Corp., 16-18 Railroad Ave., Pearl River, N.Y. 10965. $20.

Chemicals from Propylene. 1965. MAR­SHALL SITTIG. 115 pages. Noyes De­velopment Corp., 16-18 Railroad Ave., Pearl River, N.Y. 10965. $20.

CSMA. Proceedings of the 51st Annual Meeting. 166 pages. Chemical Specialties Manufacturers Association, Inc., 50 East 41st St., New York, N.Y. 10017. 1965. Domestic, $10; foreign, $11.

Electrophilic Substitution in Benzenoid Compounds. R. O. C. NORMAN, R. TAYLOR, ix + 343 pages. American Elsevier Publishing Co., 52 Vanderbilt Ave., New York, N.Y. 10017. 1965. $12.75.

General Chemistry Laboratory Opera­tions. LAWRENCE E. CONROY, R. STUART TOBIAS, viii + 191 pages. Macmillan Co., 60 Fifth Ave., New York 11, N.Y. 1965. $3.50.

General Chemistry Workbook. 3rd ed. CONWAY PIERCE, R. NELSON SMITH. 264 pages. W. H. Freeman & Co., 660 Market St., San Francisco, Calif. 94104. 1965. $2.00.

A Guidebook to Mechanism in Organic Chemistry. 2nd ed. PETER SYKES. xiii + 269 pages. Longmans, Green & Co., Ltd., 48, Grosvenor St., London, W.l , England. 1965. 24 / .

How to Find Out in Chemistry. C. R. BURMAN. vii + 220 pages. Pergamon Press, Inc., 4401 21st St., Long Island City, N.Y. 11101. 1965. 17s 6d.

Hydrocarbons from Oil Shale, Oil Sands and Coal. JOHN B. JONES, editor, iv + 119 pages. American Institute of Chemical Engineers, 345 East 47 St., New York, N.Y. 10017. 1965. AIChE members $4.00; nonmembers $15.

90 C & E N S E P T . 13, 1965

ON STREAM IN 1966

synthetic cresylics . . . purer and more plentiful

than ever before

r PITT-CONSOL

mmê

NEW MODEL 621IR SPECTROPHOTOMETER PROVIDES OPTIMUM ENERGY TRANSFER OVER ENTIRE 4000-200 CM RANGE în the Model 621 Filter-Grating* Infrared Spectrophotometer, Perkin-Elmer — world leader in infrared —has achieved a new level of performance over the instrument's total operating range: from 4000 to 200 cm'1. Fundamental to this additional per­

formance is greater utilization of available energy, even where low energy is classi­cally a problem. To do this, Perkin-Elmer has

• widened the slit opening capability to optimize performance under low energy conditions;

• enlarged the size of the Nernst glower source for greater total energy;

• utilized aspheric (toroidal, paraboloidal) optics for most efficient transfer of energy, and precise imagery—a Perkin-Elmer exclu­sive feature;

• redesigned the thermocouple detector target for greater sensitivity over the total range;

• maintained Perkin-Elmer's unique, fast

f /4.5 optical system, with short paths for efficient and rapid purging. These features provide an energy bonus and increase the optical precision of the Model 621 's system. Thus, they enhance a traditional Perkin-Elmer advantage: the unique capacity to perform microanalysis to an unequalled degree of sensitivity. No matter whether the sample is limited, or the component of quantitative interest is present only as the fractional part of a microgram, Perkin-Elmer's total system is geared to provide a quick, easy and pre­cise determination. For more information, including sample spectra, write to Perkin-Elmer Corporat ion, 707 Main Avenue, Norwalk, Connecticut.

*U. S. Pat. No. 3,144,498

performance-proved instruments for INFRARED SPECTROSCOPY

PERKINELMER

the nature of silicate coatings

SILICATES BECOME INSOLUBLE COATINGS WITH TOTAL EVAPORATION

Example: "KTsodium silicate (3.22Si02:Na20) conjoins

37.fc7o solids. Viscosi+y= 1.8 Poises/20°c. with G% water loss, viscosity=72 Poises with \lJo water loss, viscosity=9,100Poises with If % water loss,viscosity=40,000Poises(opprox.)

On further dehydrationX'forms q hard, ri^id coating.

Industrial Radioisotope Economics. IAEA. 576 pages. National Agency for International Publications, Inc., 317 East 34th St., New York, N.Y. 10016. 1965. $11.50.

Investment Funds, 1965 Survey. 296 pages. Financial Post, 481 University Ave., Toronto 2, Ont. 1965. $6.00.

Leo Hendrik Baekeland. J. GILLIS. 139 pages. Paleis der Academièn, Hertogs-straat, 1, Brussels, Belgium. 1965. 255 F.

Peaceful Application of Nuclear Energy, 5th Inter-American Symposium, vii -J-296 pages. Inter-American Nuclear Energy Commission, Organization of American States, Washington, D.C. 1965. $3.50.

Pollution Control 1965. ROBERT RICKLES. 207 pages. Noyes Development Corp., 16-18 Railroad Ave., Pearl River, N.Y. 10965. 1965. $20.

Principles of Chemical Equilibrium. KELSO B. MORRIS, xiii + 1 1 4 pages. Reinhold Publishing Corp., 430 Park Ave., New York, N.Y. 10022. 1965. $1.95.

Radiochemistry of Rhodium. JAMES C. ARMSTRONG, JR. , GREGORY R. CHOPPIN. vi + 75 pages. Clearinghouse for Federal Scientific and Technical In­formation, National Bureau of Stand­ards, U.S. Dept. of Commerce, Spring­field, Va. 1965. $1.00.

Relationships With Employees. PEPP Employer-Employee Relations Com­mittee and CEC Employee-Manage­ment Relations Committee. 18 pages. National Society of Professional Engi­neers, 2029 Κ St., N.W., Washington, D.C. 20006. 1965. 50 cents (25 cents to NSPE members ).

Reprography and Copyright Law. LOWELL H. HATTERY, GEORGE P. BUSH, editors, xiii -f- 204 pages. American Institute of Biological Sciences, 3900 Wisconsin Ave., N.W., Washington, D.C. 20016. 1965. Hard cover, $4.50 + 50 cents handling; paper, $3.00 + 50 cents handling.

Semi-Micro Qualitative Inorganic Anal­ysis. ROBERT E. D. CLARK, xiii + 121 pages. Pergamon Press, Inc., 44-01 21st St., Long Island City, N.Y. 11101. 1965. 15s.

A Series of the Statistics of Plastics In­dustry. No. I. U.S. and Japan and Others. Production and Foreign Trade, 1964. R. SEKIDO. 18 pages. Sekido Scientific Research, Tomio-cho, Nara City, Japan. 1965. $3.50.

Sillimanite: Andalusite, Kyanite, Silli-manite. E. R. VARLEY. V -j- 165 pages. Her Majesty's Stationery Office, Lon­don, England. 1965. 15s.

Spectroscopic Techniques in Organic Chemistry. A. J. BAKER, T. CAIRNS. iv + 87 pages. Heyden & Son, Ltd., Spectrum House, Alderton Crescent, London N.W. 4, England. 1965. $3.50.

The Use of Surfactants in the Petroleum Industry. P. A. REBINDER, editor, xviii -f- 346 pages. Consultants Bureau Enterprises, Inc., 227 West 17th St., New York, N.Y. 10011. 1965. $45.

Wood Chemistry Process Engineering As­pects. MOTOYOSHI OSHIMA. 157 pages. Noyes Development Corp., 16-18 Rail­road Ave., Pearl River, N.Y. 10965. $18.

Please send Bulletin T-17-52.

We have possible interest in silicate films for __

• Send monthly house organ, "Silicate P's and Q's"

NAME _ _ T I T L E

COMPANY

ADDRESS :

CITY STATE Zl Ρ

P H I L A D E L P H I A Q U A R T Z C O M P A N Y 1162 Publ ic L e d g e r Bui ld ing, Phi ladelphia, Pa. 19106 P H I L A D E L P H I A Q U A R T Z C O . of C A L I F O R N I A , Berke ley . Calif. N A T I O N A L S I L I C A T E S L I M I T E D , T o r o n t o , O n t a r i o 14 P L A N T S · D I S T R I B U T O R S IN SO CITIES IN U.S. A N D C A N A D A

92 C & E N S E P T . 13, 1965

Trade Marks Reg. U.S. Pat. Off.

Sodium and potassium silicates form quick-drying, hard coatings by losing water. These coatings can best be described in terms of properties. THICKNESS. Films as thin as 0.001" can provide effective protection for steel. THERMAL. Anhydrous silicate has remarkably high resistance to tem­peratures up to 1200°F. Adding metal powders increases this to 2000 °F. ELECTRICAL. When dehydrated, PQ sodium silicate films have good dielectric properties. Mixtures of graphite or powdered metal and silicate produce conductive coatings. MOISTURE RESISTANCE. Removing all water from silicate by baking, or by neutralizing the alkali through acid-treatment, insolubilizes the film. Silicates are especially effective in combination with styrene-butadiene latex to protect paperboard against various oils. GREASE RESISTANCE. Silicate greaseproofs paper carton stock, or acts as a priming coat for other materials. OPACITY. Add clay, titania or other pigments to make silicate films opaque. Send the coupon for your copy of Bulletin T-17-52, "Fundamentals of Silicate Coatings and Films."

SOLUBLE SILICATES