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New Wiley books for study and reference Q.E.D. HISTORY OF M.I.T. IN WORLD WAR 11 by John E. Burchard, Chairman, Board of Publication; Foreword by Dr. Karl T. Compton, President; Epilogue by Dr. J. R. Killian, Vice President. All at Massachusetts Institute of Technology. This is the dramatic story of the wartime contributions of one of the world's most famous tech- nical schools. Dr. Burchard's Preface explains: ". . . it may stand as an example of what the private universities of this nation are equipped to do for the future as they have steadfastly done in the past. If this point is made, the book will have served its purpose. " The author discusses M.I.T:'s part in research and development at the national level, then gives a more specialized report of research at M.I.T. proper. Several chapters are devoted to missions that took the staff away, and full credit is given to those who remained behind, carrying heavy overloads so that their colleagues might spend more time in war research. Q.E.D. is from the Technology Press of M.I.T. Ready in April Approximately 292 pages Probable price, $3.00 IDENTIFICATION OF ORGANIC CHLORINE COMPOUNDS by Ernest H. Huntress, Professor of Organic Chemistry, Massachusetts Institute of Technology. As well as identification, this book includes aspects of preparation, physical properties, and gen- eral chemical behavior. It is primarily concerned with compounds of Order 3, namely: compounds containing carbon and chlorine; carbon, oxygen and chlorine; carbon, hydrogen and chlorine; and carbon, oxygen, hydrogen, and chlorine. Data on individual compounds are arranged in the following manner: heading; fundamental physical constants; general data on other constants; preparation and properties; designation of special or preliminary tests; derivatives; and references to the original literature. About 1400 compounds are included in this volume. In press Approximately 1414 pages Probable price, $25.00 THE STRUCTURE OF MATTER by Francis Owen Rice, Professor and Head of the Department of Chemistry, Catholic University, and Dr. Edward Teller, Institute for Nuclear Studies. This book contains material of vital importance to those engaged in or interested in nuclear re- search. Both physicists and chemists will find The Structure of Matter of great value. The work includes an introduction to the subject, and discussions of: the hydrogen atom; the periodic system; motion and position of nuclei in molecules; atoms and molecules in electric fields; Van der Wall's attractive forces; the chemical bond; forces in the solid state; magnetic properties of matter; infra- red and Raman spectra; electronic spectra; nuclear chemistry; and the state of matter in stars. Ready in June - .DETOXICATION MECHANISMS by R. T. Williams, Senior Lecturer in Biochemistry, University of Liverpool, England. Detoxication Mechanisms gathers together in logical order the available information on the meta- bolic fate of organic compounds foreign to the body. The book aims to make it possible for the worker to advance suitable working hypotheses. It covers the metabolism of: aliphatic compounds; cyclohexane derivatives; aromatic hydrocarbons; halogenated aromatic hydrocarbons; phenols; aro- matic alcohols, ethers, aldehydes, ketones, amides; aromatic acids; organic cyanides; aromatic nitro, amino and azo compounds; sulphones, sulphonic acids, sulphonamides; terpenes, camphors; hetero- cylic compounds; organic compounds of arsenic. In press 288 pages $5.50 JOHN WILEY & SONS, Inc., 440 Fourth Ave., New York 16, N. Y. 9 ---E b.,

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New Wiley books for study and reference

Q.E.D.HISTORY OF M.I.T. IN WORLD WAR 11

by John E. Burchard, Chairman, Board of Publication; Foreword by Dr. Karl T. Compton, President;Epilogue by Dr. J. R. Killian, Vice President. All at Massachusetts Institute of Technology.

This is the dramatic story of the wartime contributions of one of the world's most famous tech-nical schools. Dr. Burchard's Preface explains: ". . . it may stand as an example of what theprivate universities of this nation are equipped to do for the future as they have steadfastly done inthe past. If this point is made, the book will have served its purpose. " The author discusses M.I.T:'spart in research and development at the national level, then gives a more specialized report of researchat M.I.T. proper. Several chapters are devoted to missions that took the staff away, and full creditis given to those who remained behind, carrying heavy overloads so that their colleagues might spendmore time in war research. Q.E.D. is from the Technology Press of M.I.T.Ready in April Approximately 292 pages Probable price, $3.00

IDENTIFICATION OF ORGANIC CHLORINE COMPOUNDSby Ernest H. Huntress, Professor of Organic Chemistry, Massachusetts Institute of Technology.

As well as identification, this book includes aspects of preparation, physical properties, and gen-eral chemical behavior. It is primarily concerned with compounds of Order 3, namely: compoundscontaining carbon and chlorine; carbon, oxygen and chlorine; carbon, hydrogen and chlorine; andcarbon, oxygen, hydrogen, and chlorine. Data on individual compounds are arranged in the followingmanner: heading; fundamental physical constants; general data on other constants; preparation andproperties; designation of special or preliminary tests; derivatives; and references to the originalliterature. About 1400 compounds are included in this volume.In press Approximately 1414 pages Probable price, $25.00

THE STRUCTURE OF MATTERby Francis Owen Rice, Professor and Head of the Department of Chemistry, Catholic University, andDr. Edward Teller, Institute for Nuclear Studies.

This book contains material of vital importance to those engaged in or interested in nuclear re-search. Both physicists and chemists will find The Structure of Matter of great value. The workincludes an introduction to the subject, and discussions of: the hydrogen atom; the periodic system;motion and position of nuclei in molecules; atoms and molecules in electric fields; Van der Wall'sattractive forces; the chemical bond; forces in the solid state; magnetic properties of matter; infra-red and Raman spectra; electronic spectra; nuclear chemistry; and the state of matter in stars.

Ready in June

-.DETOXICATION MECHANISMSby R. T. Williams, Senior Lecturer in Biochemistry, University of Liverpool, England.

Detoxication Mechanisms gathers together in logical order the available information on the meta-bolic fate of organic compounds foreign to the body. The book aims to make it possible for theworker to advance suitable working hypotheses. It covers the metabolism of: aliphatic compounds;cyclohexane derivatives; aromatic hydrocarbons; halogenated aromatic hydrocarbons; phenols; aro-matic alcohols, ethers, aldehydes, ketones, amides; aromatic acids; organic cyanides; aromatic nitro,amino and azo compounds; sulphones, sulphonic acids, sulphonamides; terpenes, camphors; hetero-cylic compounds; organic compounds of arsenic.In press 288 pages $5.50

JOHN WILEY & SONS, Inc., 440 Fourth Ave., New York 16, N. Y.

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FOREST INFLUENCESBy JOSEPH KITTREDGE, University of California. The AmericanForestry Series. 415pages, $4.50Brings together for the first time the widely scattered information on the value offorests and shrubs as a protective covering for the land, analysing their basic physicalrelations to climate, water, and soil, and evaluating their usefulness and the possibili-ties in their management for the reduction of floods and erosion and the production ofmaximum yields of usable water.

ELECTRICAL MEASUREMENTS IN THEORY AND APPLICATION. New 4th editionBy ARTHUR W. SMITH, University of Michigan. 395 pages, $4.25

As before, this well-known text is intended for students who, having completed a yearof college physics, desire further knowledge of electricity and magnetism. The bookhas been thoroughly revised in the light of c lassroom experience with previous editions.All material has been brought up to date, and the presentation has been improved forgreater clarity.

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A A A S SYMPOSIA

A considerable fraction of the Symposium Volumes and Research Conferences publishedby the AAAS have been exhausted by orders not only from libraries and from specialistsin their respective fields, but also from foreign libraries and scientists. The titles remain-ing in print are shown below with prices.

There are two new volumes. Approaches to Tumor Chemotherapy, a comprehensive dis-cussion by more than 60 participants, is now available. The Riclettsial Diseases of Man,a survey of an important group of serious infectious diseases which have recently becomeimportant health problems, will be published soon.

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[] Tuberculosis and Leprosy ............ .................. $2.50 $3.00The Migration and Conservation of Salmon ....... .......... 2.00 2.50

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Chemistry ............... ......................... 2.50 3.00QAerobiology .......................................... 3.50 4.005 Relapsing Fever ............. ........................ . 2.50 3.00

FFluorine and Dental Health ............................. 2.50 3.00[ Mammary Tumors in Mice ................... 3.50 4.00O The Chemistry and Physiology of Hormones ............... 3.50 4.005Dental Caries and Fluorine .............................. 3.00 3.505 Approaches to Tumor Chemotherapy ........... .......... 6.50 7.75

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(2 vols.) $12.50Forthcoming Volumes

ROCKETS, GUNS AND TARGETSCHEMISTRY IN WORLD WAR 11APPLIED PHYSICS: ELECTRONICS,

OPTICS, METALLURGYAll volumes in this series arepublished in association withthe. Atlantic Monthly Press.

Here is the dramatic story of how Dr.Vannevar Bush and his distinguishedlieutenants set up the OSRD to mobilize

America's scientific resources for World War II.It describes, with constant reference to personsmost concerned, the administrative organization,and how it functioned to keep widely scatteredactivities in laboratories, industrial corporations,universities and elsewhere, working together asan unbeatable team for victory. $5.00

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Pre-Mixed Microbiological Assay Media (One complete mixture) :assay standards: pure amino acids (analysed): microbiologicalassays. H. M. CHEMICAL COMPANY, LTD., 144 NorthHayworth Avenue, Los Angeles 36, California.

Stimulators . . . Electro-shock, for biophysical and pharmacologi-cal determinations. $255.00, F. 0. B. Write for literature.Special electronic stimulators developed and constructed. HANS-TECH COMPANY, 1790 South 11th East Street, Salt Lake City5, Utah.

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Precision chemical analyses of minerals, carbonate, phosphateand silicate rocks. Inorganic plant constituents. Box 185A,SCIENCE.

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POSITIONS WANTED

The California Medical Bureau, Agency for scientific and lay per-sonnel in medicine, biology, chemistry, physics and allied sciences,supplies teachers, research workers, laboratory dieners, skilled officehelp. Prompt service. Registration free. Your patronage re-spectfully solicited. THE CALIFORNIA MEDICAL BUREAU,Agency, Arcadt Medical Center, 696 Colorado Street, Pasadena 1,California.

Biochemist: Ph.D. in June, pharmacology minor, desires medicalschool research or teaching appointment permitting study towardM.D. Broad background and experience. References. Box 207A,SCIENCE.

Biochemist: Ph.D., 33. Desires academic position in MiddleWest. Extensive research and teaching experience. Presentlyon faculty large Eastern university. Available after June, 1948.Box 197A, SCIENCE.

Geneticist: Agricultural and theoretical animal genetics. Broadbackground. Now assistant professor. Ph.D. this June. Single,32. Available September. Box 196A, SCIENCE.

Pharmacologist: M.D., 35, able and anxious to initiate and directsound research program, desires position offering opportunity foradvancement. At present with large Eastern university. Willattend Atlantic City meetings. Box 195A, SCIENCE.

Pharmacologist: M.D., Ph.D. Desires responsible appointment.Twelve years teaching experience. Five years industrial researchsupervision. Familiar with development of new drugs. Clinicalcontacts. Numerous publications. Box 204A, SCIENCE.

Pharmacologist: M.D., Ph.D., Senior. Seeks return to academicpost with major teaching or administrative responsibilities. Widelyknown, varied experience, recognized for teaching ability. Box203A, SCIENCE.

Professor of physical chemistry large state university system,Ph.D., 37, desires new appointment with increased opportunityfor development. Box 194A, SCIENCE.

Physiologist: Ph.D., 27, desires academic or industrial position,preferably, but not essentially, in Southern California area. Gradu-ate training includes biochemistry and nutrition. B.S. in chem-istry, physics, zoology. Several years experience in academic andindustrial positions. Sigma Xi, ACS. Box 206A, SCIENCE.

Plant physiologist: Ph.D., June, 1948. Experience teachingassistant botany, physiology, biology. Research in phytoserol-ogy. Desires teaching, teaching-research position. Box 1 74A,SCIENCE.

Psychology-and Philosophy, or administrative position. Collegeprofessor, Ph.D., outstanding references, desires advancement. Anopportunity for work and experience in clinical psychology is de-sired. P. 0. Box 1788, Spokane 6, Washington.

Research Librarian and Translator, M.S. Broad educational back-ground in biology and chemistry. Fifteen years library experi-ence. Good knowledge of French, Russian and German. Wellqualified to conduct scientific literature searches and write compre-hensive reviews on assigned topics. Experienced translator andabstractor of scientific literature. Desires position in a researchorganization or educational institution. Eastern states preferred,but not essential. Box 202A, SCIENCE.

Zoologist: Ph.D., 18 years teaching biology and premedical coursesdesires change. Smaller college in Northwest preferred. Box205A, SCIENCE.

Zoologist: Vertebrate, Ecology. Ph.D. Cornell. Several yearssuccessful teaching, research, administrative work. Publications,national societies, graduate students. Desires non-administrativeposition with opportunity for research. Excellent recommenda-tions. Married. Box 201A, SCIENCE.

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Chemist: Ph.D. (major, organic chemistry; minor, microbiology);several years teaching experience; four years, research fellow inbiochemistry and pathology; eight years, director of research inlarge industrial company; for further information, please writeBurneice Larson, Director, Medical Bureau, Palmolive Building,Chicago 11.

Plant Physiologist: Ph.D., associate professor, 14 years experience,publications. Wants teaching position with research opportunitiesin more desirable location. Box 208A, SCIENCE.

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Wanted for summer months: Biochemist to work in large Chicagomedical laboratory simplifying existing techniques. State salarydesired. Box 198A, SCIENCE.

Chemists and Chemical Engineers-Organic chemists with knowl-edge of synthetic resins for development work on electric insulatingmaterials, also chemical engineers for development and pilot plantmanufacture of electrical insulating materials. Unusual aptitudefor original work required, coupled with mental alertness and highorder of initiative. For application address Manager, TechnicalEmployment, Westinghouse Electric Corporation, 306 FourthAvenue, Pittsburgh, Pennsylvania.

Entomologist: Capable contact man for technical service work withagricultural chemicals. Ability to evaluate new insecticide de-velopments and conduct field tests essential. Some experiencerequired. Headquarters located in New York City. Box 193A,SCIENCE.

Field Entomologist: A well-established and nationally known manu-facturer of agricultural chemicals requires the services of an ento-mologist for field work in the Pacific Northwest, with headquartersin Washington or Oregon. The duties of the post include therunning, observing, checking and reporting of field tests (through-out the territory assigned) with products developed in our researchprogram, and consultation with the trade and state and Govern-ment stations. Materials handled include insecticides, fungicides,herbicides, etc. In reply, please include all pertinent personal andprofessional information and photograph. Box 188A, SCIENCE.

Microbiologist: Permanent research position open in July. Newlyestablished laboratory studying post-harvest problems of fruits andvegetables. Prefer young plant pathologist or bacteriologist withplant science background. Chemical training helpful. Excellentopportunity for advancement. Salary to $4,000. Box 210A,SCIENCE.Wanted: Pharmacologist under 35, for pharmaceutical house inmidwest. Some industrial experience desirable. Include full de-tails in reply. Box 199A, SCIENCE.

Physiologist: M.D. or Ph.D. for research in neurophysiology.Faculty appointment in eastern medical school. State researchand other experience, education, publications, etc. Box 182A,SCIENCE.

Wanted: Several physicists to do research work on military opticalinstrument problems and development of the instruments. Knowl-edge of electronic control methods desirable. Instrument designability essential. Detail knowledge of optical design not necessary.Box 211A, SCIENCE.

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Box 200 A, SCIENCE.

Personnel PlacementPOSITIONS OPEN

Biochemist: Wanted a technical assistant interested in work onenzyme systems in the brain. Experience with the Warburgtechnique necessary. Address W. Ashby, St. Elizabeths Hospital,Washington 20.Biochemical Research Foundation connected with University ofDelaware, Newark, Del., has positions open for research physicist(cyclotron experience if possible), chemists, cytologists and bac-teriologists. Salary ample and commensurate with experienceand ability.Positions Open: (a) Pharmacologist to head department universitymedical school; Ph.D. or M.D. $6,000-$7,000. (b) Physiologist;university medical school department of physiology; rank, instruc-tor or assistant professor; nine-month year; summer teachingavailable. (c) Bacteriologist, preferably Ph.D., to take charge ofnew bacteriology department in connection with research for newdrug products; $4,000-$5,000. (d) Chemical engineer or chemistwith B.S. degree to serve as administrative assistant to director ofresearch and development; recent graduates eligible. (e) Youngman with masters degree in biological sciences, preferably bacteri-ology or parasitology for research assistantship; problems mainlywith chemotherapy of parasitic infections; Middle West. (f) Psy-chologist for teaching appointment; rank: assistant or associateprofessorship; Ph.D. preferred; masters eligible. (g) Associateand, also, assistant professor in anatomy; university medical school;new, modern quarters; laboratories equipped to pursue any typeof anatomical research. (h) Bacteriologist trained in parasitologyto head the department of bacteriology, university medical school;$6,000. S2-4, Medical Bureau (Burneice Larson, Director),Palmolive Building, Chicago 11.

Universities and Colleges throughoutAMERICAN the United States continue their

great demand for recommendationsCOLLEGE for those trained in the differentfields of Science. Th toiodosBUREAU range from instructorhis to heads

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Chkp 4, IL Our serce is nationwide.VACANCIES FOR PROFESSIONAL AND

TECHNICAL STAFFMETEOROLOGICAL SERVICESUNION OF SOUTH AFRICA

Applications are invited for appointment to the abovementionedposts in the Department of Transport, under the Government ofthe Union of South Africa.

PROFESSIONAL DIVISION (HIGHER BRANCH)Post: Principal meteorologist; scale: £ 960 x 40- 1080.Post: Senior meteorologist; scale: £ 840 x 30-960.Post: Meteorologist; scale: £ 600 x 30 - 840.Post: Junior meteorologist; scale: £ 300 x 25 - 600.Minimum qualifications required: B.Sc. degree (or equivalent)with at least one of the following as major subjects: physicsmathematics, applied mathematics. Age experience and quali-fications will be taken into consideration when selecting candidates.Forecasting experience in sub-tropical regions will be a strongrecommendation.

PROFESSIONAL DIVISION (LOWER BRANCH)Post: Principal technical assistant; scale: £ 720 x 30-.840.Post: Senior technical assistant; scale: £ 600 x 30 - 720.Post: Technical assistant, Grade 1 ; scale: £ 400 x 25 - 600.Minimum qualifications required: Matriculation (or equivalent)with mathematics as a subject. Preference will be given tocandidates who have also taken physics or physical science as asubject. Age, experience and qualifications will be taken intoconsideration when selecting candidates.In addition to substantive salary a cost-of-living allowance is pay-able. The following rates apply at present: Salary group over£ 300 to £ 720 p.a., married, £ 140 p.a.; single, £ 40 pa.; over£ 720 to £ 1080 p.a., married, £ 140 p.a.; single, £ 28 p.a.Each candidate will in the first instance be appointed on contractfor a period of three years with salary at an appropriate notch ofthe relevant scale. Annual increments will be granted subject tosatisfactory service.Upon completion of the period of contract, the appointee will beconsidered for an extension of such Period or, on production ofevidence of a satisfactory knowledge of both the official languages,i.e., English and Afrikaans, for permanent appointment in thePublic Service.Applicants must submit full and detailed particulars of their quali-fications and previous experience (including any period of militaryservice), but original certificates and testimonials should not besubmitted in the first instance.Applications must be made on the prescribed forms (Z. 83 andP. S. C. 8) which are obtainable from the Envoy Extraordinaryand Minister Plenipotentiary for the Union of South. Africa, 3101Massachusetts Avenue, Washington, D. C., to whom all completedforms must be addressed, and who will furnish further particularson request.The closing date for the receipt of applications will be 30th April,1948.

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SCIENCE1515 Massachusetts Avenue, N. W.

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RESEARCH AND DEVELOPMENTPOSITIONS

Senior-Intermediate-Junior level for participa-tion in the program of investigating the applica-tion of nuclear energy to the propulsion of aircraftnow being carried on at Oak Ridge, Tennessee.Salaries will be commensurate with qualifications.

Inquiries welcomed fromPHYSICISTS-CHEMISTS-CHEMICAL

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In the fields ofNuclear, Theoretical, Experimental and Applied Physics;Physical and Chemical Studies at High Temperatures;

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The Mathematical Analysis of Physical Problems includingNuclear Physics, Heat Transfer, Mechanics and Statistics;Aerodynamics; Stress, Weight and Structure Analysis;

Thermodynamics, Heat Transfer and Fluid Flow;Design-Layout-Testing of Powerplant,

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