Organic Chemical Crystallography. A. I. Kitaigorodskii. English trans­lation and publication by Consultants Bureau Enterprises, Inc., 227 W. 17th St., New York 11, Ν. Y. $17,50. 1961. Five chapters, subject index, compound index, 54-1 pages, 506 illustrations.

Reviewed by T, G. Rochow, Central Research Division, American Cyanamid Co., Stamford, Conn.

Professor A. I. Kitaigorodskii is Head of the Institute of Elemental Organic Compounds of the U.S.S.R. Academy of Sciences in Moscow. His Russian text was published in 1955. The English translation includes the author's revisions and two new sec­tions: one on the crystal structure of short-chain aliphatics, the other on solid solutions in organic crystals. The book deals with molecular crystals and, with few exceptions, these are crystals of organic compounds. In the past 30 years organic chemical crystal­lography has advanced to structural analyses as complex as those of peni­cillin and vitamin B1 2 . Such studies inform the chemist on stereochemical data, valence angles, and intra­molecular distances. Accordingly, he understands those properties which de­pend on the molecule. Yet many properties, such as mechanical and thermal ones, depend but slightly on the structure of the molecule and its intramolecular forces but decisively on inter molecular forces. The author's subject is also important because it is the foundation for understanding the structure of macromolecular materials (beyond the scope of the book).

The theory upon which the book is based assumes that molecules are of defined shape and pack themselves so that the projections in one enter the hollows in another, resulting in mini­mum free energy at the "surface" of molecules. A molecule in a crystal is one type of unit. Other types of units are the space group and the crystal itself. "Hence not every unit is a mole­cule but every molecule is a unit." The way in which intermolecular spacings change between classes of compounds (e.g. aromatic and aliphatic) is of great interest. Experiment shows that this and many aspects of organic crys­tal morphologies and structures can be explained geometrically and that the molecular close packing theory is a good approximation to reality.

The first two chapters are introduc­tory and are directed chiefly to chem­ists. Chapters 3 and 4 are the heart of

the book. They represent the theory of close packing to explain and predict the structures of organic compounds. Chapter 5 is a critical compilation of publications on the crystal structure of organic compounds. Although the title might indicate that the book is on gen­eral crystallography, the experimental methods are confined to those of x-rays. While great credit is deserv­edly given to E. S. Fedorov ase one of the founders of general crystallography and the conceiver of space groups in 1891, still little reliance is placed on the methods of goniometry and optical crystallography which Fedorov be­queathed. For example on page 118, Kitaigorodskii explains that the inter­pretations of x-ray diffraction of CBr4 are of the year 1924 and doubtful: "Below 47° C. the crystals appear to fall in the monoclinic system. A cubic cell can also be chosen, it is true, but optical data indicate monoclinic." In this and many instances, optical data have done more than "indicate"; they have proved some aspects of symmetry. S. C. Nyburg devotes a little space to optical methods, although his book is entitled "X-Ray Analysis of Or­ganic Structures" (1961).

Kitaigorodskii's book is very well illustrated and the dominant projec­tion-in-hollow principle gives an im­portant, fresh viewpoint. I t can be of great help to chemists in both analyses and syntheses.

Fundamentals of Quality Control for the Food Industry. Amihud Kramer and A. Twigg. xvi + 512 pages. Avi Publishing Co., Inc., P.O. Box 388, Westport, Conn. 1962. Domestic $14.75. Foreign $15.75.

Reviewed by E. Borker, General Foods Corp., Tarrytown, Ν. Ύ.

This book brings together elemental information needed in control of food processing. It is best suited for stu­dents and those relatively inexperienced in food industry quality control. Most chapters have extensive bibliographies.

The opening two chapters give the author's general concepts of quality control and the responsibilities, organ­ization and relationships of the de­partment performing the function.

Physical measurements, related to consumer sensory acceptance, are de­scribed in chapters on color and gloss; viscosity and consistency; size and shape; and kinesthetics or texture. Chapters on defects, flavor, and taste testing discuss sensory evaluations and methods and techniques for making

these evaluations as objectively as pos­sible. The chapter entitled, "Micro-analytical Methods," might be more appropriately called, "Microbiological Methods" or "Extraneous Matter." Chlorination is the major portion of a chapter on water, waste material, and sanitation.

There are chapters on government and trade standards of quality and the development of grades and standards as well as ûve chapters on the appli­cation of statistical methods in ac­ceptance sampling and inspection; use of control charts; production control; inventory control and budgeting; and transportation. An appendix outlining statistical methods includes material found in elementary statistical texts.

High Resolution NMR Spectra Cata­log. Compiled by N. S. Bhacca, L. F. Johnson, and J. M. Shoolery. 224 pages. Varian Associates. Palo Alto, Calif. 1962. $5.00. Student price $4.00.

This book presents a collection of 368 spectra of simple and more complex organic compounds which were ob­tained with a Varian A-60 high resolu­tion NMR spectrometer at the Appli­cations Laboratories of Varian Associ­ates' Instrument Division. Among the compounds studied were alkaloids, anes­thetics, monomers, peroxides, steroids, terpenes, and vitamins. The experi­mental work was undertaken with a twofold purpose: to record and cor­relate proton spectra with the chemical shift on a precalibrated chart and to interpret NMR spectra in terms of chemical structures. According to the authors, the latter point is very valu­able to the analytical chemist in inter­preting the spectra of mixtures or of complex molecules because he could superpose on the unknown spectrum the spectra of simpler compounds or of moieties found in a mixture of less complex molecules.

The spectra were obtained under the following experimental conditions. Di­lute solutions (7%) of the compound to be investigated were run at 60 mc. The same solvent, CDC13, was used in all studies. Tetramethylsilane was the internal reference and its frequency was arbitrarily taken as zero. Shift posi­tions were referred only to field-inde­pendent units wThich were chosen on a field-independent scale of chemical shifts directly related to frequency units (cycles per second) and defined by three mathematical relations in the In­troduction.

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The spectra are arranged in order of increasing complexity of the empirical formula (except 97 and 176) and there are two per page. The following in­formation is supplied for each spec­trum: common name (if available), empirical and structural formulas, sweep offset, sweep time, frequency re­sponse, specific instrument amplitude setting, spectral assignments, and un­usual operating conditions. Impurities present (above trace amounts) which cause peak positions are assigned fre­quencies after all shifts have been ac­counted for and reported as "imp." The accuracy of the data presented is within 1 cycle per second or 0.02 p.p.m.

Detailed information is available on the estimation of sharp lines, centers of broad lines, multiplets, first moments, and spin-spin multiplet patterns.

The book also contains a chart and three tables. The chart is divided into two columns. One headed "Main Groups" supplies 21 different groups of various proton chemical environ­ments. These groups are further sub­divided into subgroups and sub-sub­groups. The 26 sub-subgroups are found in the "Functional Groups" col­umn and are designated alphabetically by lower case letters. In order to sys­tematize the search for proton chemical environments and functional groups, a number and letter coding system is used and it is applied on examples chosen from branched, substituted aliphatic derivatives, olefins, alicyclic, aromatic, and heterocyclic compounds. Table I is a name index, Table II, a functional group index (giving code, shift, and spectrum number) ; and Table III, a shift index.

The Radiochemical Manual. Part 1. Physical Data. 102 pages. The Radiochemical Centre, Amersham. Her Majesty's Stationary Office, London, England. 1962. 15 s.

This brochure presents physical data from report A.E.R.E.-R2938 "Ra­dioisotope Data" compiled by the Iso­tope Research Division, United King­dom Atomic Energy Authority. Infor­mation mostly in tabular form is given on 160 radioisotopes. The first section reviews standard methods of produc­ing the isotopes by neutron bombard­ment in a reactor or by charged parti­cle reactions in a cyclotron.

Table I covers alphabetically in 63 pages commonly used and readily ac­cessible isotopes. I t supplies basic physical data (half life, type of decay and particle energies, τ-radiation ener­gies, specific 7-ray emission), produc­tion process, target material, and refer-

NEW BOOKS

ence to physical and chemical forms available. Table I I has data on 39 radioisotopes available in unprocessed irradiation units. Tables III, IV, and V focus attention on three natural ra­dioactive series, while Tables VI, VII, and VIII list β-, γ-, and β+-emitting isotopes, respectively, grouped by half life and particle or radiation energy.

Other features of this manual are information on detectable minimum ac­tivities of α-, β-, and γ-radiations, glossaries of terms used in the tables and in radiochemistry, and a section on physical characteristics of radiation sources for use in special applications.

Analyse der Metalle. Zweiter Band. Erster Tell. Aluminum bis Schwe-fel. Zweiter Teif. Selen bis Zirkonium. Physikalisch-chem-ische Verfahren. Part I. xvi -f

726 pages. Part II. iv + 8^1 pages. Compiled by Gesellschaft Deutscher Metallhutten- und Ber-gleute e.V. Springer -Verlag, Berlin, W. Germany. 1961. Cloth bound. DM 158.

This volume II (revised) consists of two parts. Both relate to physical and chemical methods of analysis of non-ferrous metals, ores, intermediates, and finished metals and their alloys.

Part 1, with 726 pages covers alumi­num to sulfur; part 2 with 841 pages, covers selenium to zirconium plus physical-chemical procedures. Part 2 has a subject and author index.

Computer Basics. 5 Volumes. How­ard W. Sams & Co., Inc., 1720 East 38th St., Indianapolis 6, Ind. 1962. $22.50 ; single volumes, $1^.95.

This encyclopedic study of electronic computers was developed over a 2-year period for the U. S. Navy by Techni­cal Education and Management, Inc. The books are essentially a course of instruction and review questions and practice exercises are included at the end of each chapter.

A comprehensive treatment of such subjects as semiconductor and magnetic elements, wave-shaping and wave-train generation, gating and logic circuits, possible future elements such as ferro­electric devices, core switches, nerve cells, and polarized light is given. Computer organization, programming, maintenance, and troubleshooting are discussed in detail.

The books contain 955 illustrations reinforced by hundreds of photos, block and circuit diagrams, exploded views, and line illustrations to simplify under­standing.

New Dohrmann Microcoulometric Ti­trating System detects submicrogram to milligram amounts of sulfur or halo­gen in complex mixtures with absolute specificity. Other important features include:

• Sensitivity to 0.01 micrograms • Linearity throughout a wide

dynamic range • Continuous operation (records

full titration curves ) • Automatic sample handling,

combustion, titration • Absolute quantitative results,

based on Faraday's Law

System functions as a specific detector for gas chromatography, or as a self-contained instrument for total consti­tuent assays. Complete information in Technical Bulletin #500.

Dohrmann Pesticide Residue Analyzer

Speeds and simplifies analysis of pes­ticide residues in food samples. Com­bines in one unit a gas chromatograph with pre-conditioned columns and a sensitive, specific microcoulometric de­tector. Ask for bulletin entitled "Pes­ticide Residue Analysis".

Dohrmann Kuderna-Danish Glassware

Incorporates new design improvements for rapid, economical food sample con­centrations. Features complete inter-changeability of all parts, calibrated volume ampoules. More in Technical Bulletin #501.

VOL. 34 , N O . 7 , JUNE 1962 · 6 3 A

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Factory installation in customer cell block—$75.00. Customer instal­lation—Minimum 3 pairs @ $30.00 each.

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NEW BOOKS

Electrochemistry of Molten and Solid Electrolytes. 106 pages. Author­ized translation from the Russian. Consultants Bureau Enterprises, Inc., 227 West 17th St., New York 11, Ν. Υ. $17,50.

This book is the first of a series in which the results of original investiga­tions made at the Institute of Electro­chemistry of the Ural Section of the Academy of Sciences of the U.S.S.R. are being published. The book is in­tended for electrochemists and others interested in the properties of molten and solid electrolytes at high tempera­tures.

A total of 20 articles appears in this book. The first papers are concerned with the electrochemistry of molten electrolytes and the later ones with solid electrolytes such as salts and oxides.

Symposium on Major Effects of Minor Constituents on the Properties of Materials. STP-304. vi + 90 pages. American Society for Testing Materials, 1916 Race St., Philadel­phia 3, Pa. 1962. $3.75. To ASTM members: $3.00.

The effects of minor constituents on the properties of crystalline solids, liq­uids, and ionized gases are discussed in this volume which presents contribu­tions from the Symposium on Proper­ties of Materials sponsored by the ASTM Division of Material Sciences. The role of "extraneous" substances in the high purity materials demanded by solid state electronics is considered from varied viewpoints covering the related areas of physics, chemistry, ceramics, and metallurgy.

A Simplified Technique of Control System Engineering. Revised edi­tion. G. K. Tucker and D. M. Wills. Minneapolis - Honeywell Regidator Co., Wayne and Windrim Aves., Philadelphia U, Pa. 1962. $5.00.

This book presents a nonmathemati-cal treatment of process control systems which includes a graphic method for dynamic analyses. The English edition, first published in 1959, has been trans­lated into German, Japanese, and Hun­garian. The revised edition has an alphabetical subject index and a section on recent, related literature.

Critical reviews of these books are scheduled to appear in future issues of ANALYTICAL CHEMISTRY.

Biochemical Applications of Gas Chromatography. H. P. Burch­field and Eleanor E. Storrs. xvii +

6 4 A · ANALYTICAL CHEMISTRY

NEW GOW-MAC

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680 pages. Academic Press, Inc., Ill Fifth Ave., New York 3, Ν. Y. 1962. $22.

Handbuch der mikrochemischen Methoden. Drifter Band. Anor-ganische chromatographische Methoden. Friedrich Hecht and Michael K. Zacherl, editors. 225 pages. Springer-Verlag in Wien 1, Molkerbastei 5. 1961. $16.75.

Manual of Practical Micro and Gen­eral Procedures in Clinical Chem­istry. Samuel Mettes and Willard

R. Faulkner. xvi + 354 pages. Charles C Thomas. 301-27 East Lawrence Ave., Springfield, III. 1962. $11,50.

Standard Methods of Chemical Analysis. Vol. 1 . The Elements. 6th ed. N. Howell Furman, editor. x\x -\- lJfil pages. D. Van Nos-trand Co., Inc., 120 Alexander St., Princeton, N. J. 1962. $25.

Atomic Spectra. H. G. Kuhn. xvi -f- 436 pages. Academic Press, Inc., Ill Fifth Ave., New York 3, Ν. Υ. 1962. $13.

X-Ray Powder Data for Ore Miner­als: The Peacock Atlas. L. G. Berry and R. M. Thompson, vi + 2S1 pages. Geological Society of America, 419 West li7th St., New York 27, Ν. Υ. 1962. $8.25.

Advances In Clinical Chemistry. Vol. 4. Harry Sobotka and C. P. Stewart, editors, ν -f- 378 pages. Academic Press Inc., Ill Fifth Ave., New York 3, Ν. Υ. 1961. $12.

U. S. Government Publications

The following publications are avail­able from the Office of Technical Serv­ices, Washington 25, D. C.

Thermionic Electron Sources. AD 266 039. G. A. Hass, U. S. Naval Research Laboratory. 28 pages. 1961. 75 cents.

This report discusses the character­istics which relate to current density for various cathodes with temperatures ranging from 600° to approximately 3000° K. Tables are included which CMWV the effective work function and temperature range measured for more than TOO specific cathodes.

Thr r'Tr'.r. also lists 103 references, both foreign ;md domestic, relating to cathodes and eu:-tK>nic tubes. Advan­tages and disadvjj.t) ages of the various classes of cathodes a;. ^- -'bed

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Electron Spin Resonance Line Widths of Transition Metals Ions and Com­plexes in Solution. UCRL-9873. September 1961. 93 pages. $2.00.

Ion-Exchange Elution Sequences with Chelating Eluants. IS-329. May 1960. 55 pages. $1.25.

Anion Exchange Separations of Metal Ions in Partially Nonaqueous Solu­tions. IS-337. November 1960. 207 pages. $3.00.

Separation of Metal Ions on Chelat­ing Resin. IS-340. May 1961. 31 pages. 75 cents.

Removing Major Contaminants for Nitrogen Generator Gas. K-1477. November 1961. 16 pages. 50 cents.

Beryllium Oxide Single Crystal Growth. I I . Water Vapor Trans­port Method. NAA-SR-6420. No­vember 1961. 19 pages. 50 cents.

Ion Mobilities in Fused Salts. IS-344. May 1961. 54 pages. $1.25.

Electrical Conductivity of Fused Salts. MATT-99. August 1961. 61 pages. $1.50.

On pH Effects in the Radiolysis of Aquo-Organic Systems. UCRL-9903 . October 1961. 5 pages. 50 cents.

Determination of Iodide in Lead Tel-luride Semiconductor. NAA-SR-6804. January 1962. 12 pages. 50 cents.

Determination of Trace Amounts of Sulfur in Graphite. Y-1376. De­cember 1961. 15 pages. 50 cents.

Determination of Heavy Water Pu­rity by Infrared Absorption. IDO-14576. January 1962. 7 pages. 50 cents.

Some Recently Developed Chemical and Physical Analytical Methods. UCRL-6639. April 1961. U V^es. $1.00.

Magnetic Resonance of Metals and Paramagnetic Ions in Solution. UCRL-9944. December 1961. 73 pages. $1.50.

U. S. Government Publications

The following can be obtained from the Superintendent of Documents, U. S. Government Printing Office, Washing­ton 25, D. C.

Standard X-Ray Diffraction Powder Patterns. National Bureau of Standards. Monograph 25, Section

1. Howard E. Swanson, M. C. Mor­ris, Roger P. Stinchfield, and Eloise IL Evans. 56 pages. 1962. Jfi cents.

This monograph presents x-ray data for 46 compounds among which are included cerium (III) vanadate, erbium gallium oxide 3:5, holmium ethyl sul­fate nonahydrate, lanthanum borate, lutetium oxide, nickel (II) carbonate, praseodymium (III) chloride, and zir­conium iodate. Diffraction powder patterns previously reported for 12 compounds are replaced by new data. The National Bureau of Standards pro­gram for the revision and evaluation of published x-ray data for the x-ray powder data file is sponsored jointly by the American Society for Testing and Materials, the American Crystallo­graphy Association, and the British In­stitute of Physics. Previous publica-. tions on this program were designated as "Circular 539," volumes 1 to 10. A new series "Monograph 25" is started with the present report which is Section 1 ; subsequent sections will be added yearly.

The Introduction is a brief but clear account of the arrangement used in re­porting the experimental data. It also gives conversion factors for comparison of peak heights and integrated inten­sities. The information on each of the 46 compounds reported includes: ASTM reference (file card number, in­dex lines, radiation type, literature source), previously published patterns, history of the sample used, structural data (space grouping, lattice con­stants), and pertinent literature refer­ences.

The last section of the report con­tains a cumulative index to the 10 vol­umes already published.

Current Research and Development in Scientific Documentation No. 9. National Science Foundation. 270 pages. November 1961. $1.25.

Ninth in a series of descriptive re­ports which appear in May and No­vember of each year, this paper-bound volume describes all pertinent studies on scientific documentation in the United States that have come to the attention of the Foundation staff. For­eign projects are also included to the extent that information is obtainable.

Thermocouple Materials. F. R. Cald­well. NBS Monograph Jfi. 43 pages. March 1962. 30 cents.

Thermocouples that are used pri­marily as immersion temperature sen­sors in the range from 0° C. up to the highest temperature at which thermo-

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Ronceverte, W. Va. Emil Greiner New York, Ν. Υ. Harshaw Chemical Co. All offices Jarrell-Ash Co. Newtonville, Mass. Lachat Chemicals, Inc. Chicago. III. Loe Engineering Co. Altadena, Calif. Metro Industries Long Island City, Ν. Υ. Nester & Faust Newark, Delaware Perkin-Elmer Corp. Norwalk, Conn. Phipps & Bird, Inc. Richmond, Va. Podbielniak, Inc. Chicago, III. Precision Scientific Co. Chicago 47, III. B. Preiser Co. Inc. Charleston, W. Va. Research Specialties Co.

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6 6 A · ANALYTICAL CHEMISTRY

NESTER SPINNING BAND DISTILLATION COLUMNS

An improved type for use under high vacuum . . . developed to meet the need for a labora­tory still superior to conventional types in the fractionation of heat-sensitive or high-boiling, high viscosity liquids.

The columns contain spiral screen bands having 300 teeth per inch contacting the walls of the still. This construction provides violent agita­tion of the reflux liquid and gives intimate contact of descending and ascending vapors. The reflux ratio of the still is controlled by means of an adjustable needle valve eliminat­ing the possibility of leakage.

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couples are used are considered in this Monograph. The physical or chemical properties of the materials used are presented in 109 tables. Thermo­couples for thermoelectric generators and those used chiefly in radiation re­ceivers are not considered. However, ceramic-packed thermocouples in metal sheaths are described.

Theory and Methods of Optical Py-rometry. H. J. Kostkowski and R. D. Lee. NBS Monograph 4L 28 pages. March 1962, 25 cents.

A detailed review of the theoretical methods of optical pyrometry is pre­sented The concepts of effective and mean effective wavelengths are given and equations which relate these pa­rameters to each other and other physi­cal quantities are derived.

Applications of these methods at the National Bureau of Standards in real­izing, maintaining, and disseminating the International Practical Tempera­ture Scale above 1063° C , as well as ex­perimental procedures and results of optical pyrometer calibration are de­scribed.

Recommendations for achieving high precision and accuracy are made, and the fundamental limitations in visual optical pyrometry are discussed.

Report of the 46th National Con­ference on Weights and Measures. NBS Miscellaneous Publication 239. 177 pages. January 1962. 65 cents.

The full proceedings of the Confer­ence are recorded in this report. In­cluded are package standardization, package labeling, weights of frozen turkeys, bread tolerances, and large in­dustry quantity control. Other papers discussed phases of the weights and measures programs in other countries, and progress in measurements of mois­ture in grain.

Also included is a complete list of persons attending the Conference and their official connection, plus a list of all Conference officers and committee members.

Standard Materials Issued by the National Bureau of Standards, A Descriptive List with Prices. Na­tional Bureau of Standards Miscel­laneous Publication 2J/.1. 32 pages. 1962. 30 cents.

This publication supersedes NBS Circular 552, 3rd edition. It lists the more than 600 different standards of metals, ores, ceramics, chemicals, and hydrocarbons made available by NBS

6 8 A · ANALYTICAL CHEMISTRY

AMINO ACID ANALYZER

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for distribution. The materials are classified into groups according to the purposes for which they are intended and the kind of certification, if any, that applies to them. Summarized tables of analyses are also given to in­dicate the type of standards of com­position currently available. A sched­ule of fees and weights, as well as di­rections for ordering, are included.

S p e c t r o g r a p h s Analysis f o r Selected M i n o r Elements in P ier re Shale . Paul R. Barnett. Geological Survey Professional Paper 391-B. 10 pages. 1961. 20 cents.

Spectrographs determinations made on 80 samples of Pierre shale (Late Cretaceous) for 10 elements are de­scribed. The elements determined were boron, barium, cobalt, chromium, gal­lium, nickel, scandium, strontium, ti­tanium, and zirconium. The paper also lists a comparison of the results by chemical and spectrographic determina­tions in terms of the coefficients of variation.

Chemical Analysis f o r Selected M i n o r Elements in P ier re Sha le . L. F. Rader and F. S. Grimaldi. Geologi­cal Survey Professional Paper 391-A. 45 pages. 1961. Jfi cents.

This paper reports the results of a study of the analytical precision of chemical methods for the determination of selected minor elements in Pierre shale. Detailed procedures are given for the determination of titanium, va­nadium, chromium, manganese, cobalt, nickel, uranium, carbonate carbon, total carbon, and organic matter. Graphic comparisons are made of determina­tions by different chemists to indicate either the agreement or the bias of results. The paper includes 55 tables and 19 illustrations.

A P r i m a r y Ultrasonic S t a n d a r d . AD 268 303. S. T. Boghosian and J. W. Orner, Watertown Arsenal. 17 pages. December 1961. 50 cents.

This is a report on studies to estab­lish ultrasonic standards to be used in the determination of ultrasonic instru­ment sensitivity and inspection specifi­cations. The steel ball vibration method is used in immersion testing.

The Development of α High Tem­perature (1GOO C.) Gas Chroma­tograph. AD 268 700. C. B. Easton and A. J. Martin, F & M Scientific

Corp. for Aeronautical Systems Divi­sion, U. S. Air Force. 21 pages. June 1961. 75 cents.

The development of a high tempera­ture gas chromatograph is described. Temperature operation can be iso­thermal or linearly programmed. The novel integrated, stainless steel column is heated by the passage of electric cur­rents (up to 120 amp.) and the sensi­tive detector uses hydrogen flame ion­ization.

Tables of Spectral -Line Intensit ies. Par t I. A r r a n g e d b y Elements. National Bureau of Standards Mono­

graph 32. Part I. W. F. Meggers, C. H. Corliss, and B. F. Scribner. 473 pages. 1961. $4.00.

This monograph gives in tabular form, for 70 elements, the intensity, character, wavelength, spectrum, and energy levels of 39,000 lines between 2000 and 9000 A. The relative intensi­ties or radiant powers were observed in a series of copper arcs each contain­ing 0.1 atomic % of an element. The experimental errors are 20% on the

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VOL. 34, NO. 7, JUNE 1 962 · 6 9 A

For accuracy, sensitivity, and resolving power CEC's new 21-130 Mass Spectrometer is superior to any other in its price range... and equals within its mass range the performance of the largest $60,000 instrument. Specifically designed for laboratory use, it has such high-performance features built in as a micromanometer and a 5-galvanometer, direct-writing oscillograph, plus a stainless steel inlet system. And yet, its price is $33,900. How is this possible? Credit CEC's 25 years of mass spectrometer experience for effecting the economies. And, for more information, call your nearby CEC sales and service office today, or write for Bulletin CEC 21130-X12.

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average and all intensities are cali­brated.

SB 4 9 1 . Fluorine and Fluorine Com­pounds. 1962. 10 cents.

This is a selective bibliography of 242 entries which includes translations and U. S. Government research reports for the period 1946 to February 1962. The preparation, handling, and storage of fluorine gas and derivatives is covered.

SB 493. Fluorocarbons. cents.

1962. 10

Selective bibliography on fluorine derivatives based on Government re­search and on reports from East and West Germany, Japan, Finland, and the U.S.S.R.

Analytical Chemistry Division Annual Progress Report for the Period Ending 31 December 1961 . ORNL-32^3. 128 pages. $2.50.

A Spectrophotemetric Attachment for the Vacuum Ultraviolet. NASA Technical Note D-699. Λ". N. Axelrod, Goddard Space Flight Center. 8 pages. Dec. 1961. Na­tional Aeronautics and Space Admin­istration, Washington 25, D. C. No charge.

Research Training Programs of the Division of General Medical Sci­ences, National Institutes of Health. PHS Publication No. 865. 30 pages. Paper cover. January 1962. Information Office, Division of General Medical Sciences, National Institutes of Health, Bethesda, Md. No charge.

This booklet describes purposes and activities of programs under which the Division provides fellowships and grant support for graduate research training in the nation's medical schools and other educational institutions.

Transactions of the All-Union Scien­tific Technical Conference on the Use of Radioactive and Stable Iso­topes and Radiations in the Na­tional Economy and in Science, April 4 to 12, 1957. Isotopes and Radiation in Chemistry. Novem­ber 1961. AEC-tr-4497. 484 pages. $5.50.

Some Physical and Chemical Proper­ties of Scandium and the Rare Earths. IS-300. 68 pages. July 1959. $1.75.

Circle No. 159 on Readers' Service Card

7 0 A · ANALYTICAL CHEMISTRY

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