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AUGUST 24, 1945 SCIENCE-ADVERTISEMENTS 9

SCIENCE-SUPPLEMENT

SCIENCE NEWSScience Service, Washington, D. C.

TELEVISION BROADCASTING FROMAIRPLANES

TELEVISION broadcasting from stations in the sky sixmiles above the earth, in airplanes slowly cruising incircles, will be tested as soon as permits and equipmentcan be obtained, has been announced by the WestinghouseElectric Corporation. Initial flight tests of the system,known as Westinghouse Stratovision, are expected to bemade this fall.The system would employ a low-powered ground trans-

mitter to send television, and frequency modulation broad-cast waves, to a specially designed high-altitude planeencircling overhead. The plane would be equipped withreceivers and transmitters for re-broadcasting the pro-grams back to the earth.The advantages to be gained by this television broad-

casting from the stratosphere are wide coverage and rela-tively low cost over other systems proposed. Televisionand FM waves travel in a straight line and for all prac-tical purposes, according to Walter Evans of Westing-house, stop at the horizon. This means, he says, thattelevision broadcasts from the highest practical towererected on the ground can not be received much more than50 miles away."The Stratovision system," he explains, "simply puts

the antenna and transmitter in an airplane flying in lazycircles 30,000 feet above the earth, out of sight of humaneyes. The shortwaves sent out from this airborne antennawould blanket the earth's surface like a great invertedice cream cone, covering an area 422 miles across or equalto the combined area of New York, Pennsylvania and NewJersey. "

Eight such stratovision planes properly positionedwould give television and FM coverage from coast tocoast. Mr. Evans states that to provide comparable ser-vice by ground installations would require approximately100 costly relay towers and hundreds of transmitters;or a coast-to-coast coaxial cable network which is esti-mated to cost at least $100,000,000. The addition of sixmore planes in the right places would provide Stratovisioncoverage for 51 per cent. of the nation's area and 78per cent. of its population.A special slow-speed plane, almost as large as the B-29,

has been designed for the stratovision system by the GlennL. Martin Company of Baltimore. Present plans callfor a conventional all-metal, low-wing monoplane withautomatic pilots, turbochargers and supercharged cabins.

ITEMSTHE term electron-volt, once used principally by physi-

cists doing research with the atom, is now a common-place in newspaper pages. It is a measure of energy.The.energy of a moving automobile-the force with whichit might hit another object-depends on both the weightof the car and the push or the force with which it isimpelled. In the same way, the electric energy of anatomic particle depends upon its mass and the potential

or the push which impels it. In the case of the auto-mobile the energy is measured in foot-pounds. In the case-of the atomic particle, the unit is the electron-volt andis that which is given to a single electron by an electricalpush amounting to one volt. The push that lights yourelectric light is usually 110 volts. Millions of volts areused in artificial lighting and atom research.

SMALL airplanes may be easier to fly as a result of thedevelopment of a new controllable-wing plane now under-going exhaustive tests at Stout Research Division inDearborn, Mich. This experimental plane is built so that.the position of the wings in relation to the fusilage maybe changed at will by the pilot. Advantages of the con-trollable wing appear to be that it will result in greatersafety and easier handling of personal aircraft. Thecontrollable wing eliminates the necessity for ailerons,elevators and rudders. Several years may be required to-develop the wing before it can replace the conventionaltype, reports I. M. Laddon, vice-president in charge ofengineering of Consolidated Vultee Aircraft Corporation,.parent company. of the Stout laboratories. The con-trollable-wing plane was developed by George Spratt, who-piled up 100 hours of secret flying with his new planebefore friends knew he could fly.

HORSESHOEING will be the postwar work of some expert.electric arc welders now building ships if a modern methodof shoe repairing followed by a veteran blacksmithbecomes a general practice. The welding blacksmithrepairs shoes while still on the horse 's hoof, building themup or adding spurs to prevent slipping, by arc-welding-strips of metal or caulks on them. Most horses do notobject to the new procedure. Old shoes can be built upthis way a couple of times, Charles H. Chism, Coshoctonblacksmith, has found through tests. The heat of the arcor of the heated shoe does not affect the animal. In fact,the shoe during the welding process is not as hot as theshoe in the ordinary fitting process which is placed while-almost red hot against the hoof to bum it enough to geta good fit. When the welding is completed, shoe and hoofare cooled with water. Some hordes are disturbed by the-flash of the arc but are not troubled if a blanket is thrown.over their heads.

THAT alumina, the common oxide of aluminum, whichis used as an essential ingredient of super-duty spark plug-insulators, high-temperature refractories and insulators,in the field of electronics, has a lower melting point than,previously supposed, has now been determined by the Na-tional Bureau of Standards. As a result of recent mea-surements made by R. F. Geller and P. J. Yaversky, of thebureau staff, the melting point of alumina has been de-termined as lying within the range 3,630 to 3,690 de-grees Fahrenheit. This is lower than the value usuallyquoted, 3,720 degrees. A reasonably accurate knowledgeof the melting point of this material is important becauseof its wide industrial uses.

10 VOL. 102, NO. 2643

AUGUST 24, 1945 SCIENCE-ADVERTISEMENTS 11

BLAKISTONBOOKS

ANATOMYMORRIS' Human Anatomy

10th Edition"A live, modern, and teachable text"-says a teacher.This text was prepared by collaboration of well known anatomists to meet the actual needs ofmedical students. Embryological references in each section help to make the text vital andpurposeful. Clinical aspects in connection with each structure are discussed. The nomen-clature is modelled on the BNA and given in anglicized form with the BNA Latin forms in.brackets. INA terms are also included.Edited by J. PARSONS SCHAEFFER, M.D., Ph.D., Sc.D., Professor of Anatomy, Director, DanielBaugh Institute of Anatomy, Jefferson Medical College. 1155 Illus. Many in Colors. 1641Pages. $12.00

KRIEG'S Functional Neuroanatomy"It gives a sound knowledge of fundamental principles"-says a teacher.By considering basic problems first and proceeding from the simple to the complex, this text.establishes a sound working knowledge of the subject. It is designed to accomplish the integra-tion of text and laboratory work. Excellent illustrations giving the student a three-dimen-sional picture of each system are provided. An atlas of sectional reconstructions of the cord,brain and brain stem is included.By W. J. S. KRIEG, M.D., Dept. of Anatomy, Institute of Neurology, Northwestern University-School of Medicine. 274 Illus. 553 Pages. $6.50

SHEARER'S Manual of Human Dissection"Excellent in general plan and detailed treatment of dissections"-says a teacher.Written for the freshman medical student, this manual points out the structures the studentcan reasonably be expected to see in the limited time at his disposal. The manual is well likedfor its logical and concise directions and the accurate and clear drawings.By EDWIN M. SHEARER, Ph.D., Associate Professor of Anatomy, N. Y. University College ofMedicine. 79 Illus. 321 Pages. $4.25

GRAY'S Laboratory Directions forComparative Vertebrate Anatomy"Can be used by the student with a minimum of aid from the instructor"-says a teacher.This manual can be successfully used with any of the standard texts. The principal animalsconsidered are the shark, Necturus and the cat.By I. E. GRAY, Ph.D., Professor of Zoology, Duke University. 80 Pages. Flexible Binding.$1.00

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12 SCIENCE-ADVERTISEMENTS VOL. 102, No. 2643

e'd~~~amt~ 7ezt>Hesner sCOLLEGE ZOOLOGY

Well known as the outstanding text in its field this general survey forstudents who will not take advanced work is here happily combined withdetailed instruction sufficient for those who will. In the organization ofmaterial, the author's purpose has been to train students in the methodsof scientific investigation. 5th Ed. $3.75

Bruner's LABORATORY DIRECTIONS IN COLLEGE ZOOLOGYcorresponds with Hegner's College Zoology but is sufficiently detailed andcomprehensive for use with standard texts other than Hegner's. 3rd Ed.$1.75

Huettner'sFUNDAMENTALS OF COMPARATIVEEMBRYOLOGY OF THE VERTEBRATES

A modern approach and interpretation, thorough scientific accuracy, andoriginal copperplate illustrations, all exceptionally clear, detailed, andaccurate, make this an unusually fine text for students of embryology.$4.50

Essis'sCOLLEGE ENTOMOLOGY

This foundation text in entomology covers the history of the 33 orders ofinsects, emphasizing those species which, because of their historical back-ground, economic importance, or unusual and interesting appearance,should be known to all students of natural history. Full lists of families,keys for separating the various categories of insects, and abundant illus-trations, largely original, are included. $5.00

Walter'sBIOLOGY OF THE VERTEBRATES

This text has long been a favorite with students and teachers alike for itsexceptionally readable, interesting style; its completeness and clear or-ganization of content; and its wealth of well-drawn, helpful illustrations.It presents all the materials which are useful in college courses on thevertebrates or on comparative anatomy. Rev. Ed. $4.00

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12 SCIENCE-ADVERTISEMENTS VOL. 102, NO. 2643

AUGUST 24, 1945 SCIENCE-ADVERTISEMENTS 13

APPLIED NUCLEAR PHYSICSBy ERNEST POLLARD, Assistant Professor of Physics, Yale University

and WILLIAM L. DAVIDSON, JR., Research Physicist, B. F. Goodrich Co.

ALL THE ESSENTIAL TOPICS that must bemastered for a proper understanding of the prin-ciples behind the atomic bomb are covered in thisvolume, which contains information presented no-where else in book form. Since it was publishedjust before censorship restricted information onnuclear fission, it is as up to date as security con-ditions permit at the present time.

The only book devoted exclusively to nuclear phy s-ics which was published after the discovery ofuranium fission, APPLIED NUCLEAR PHYSICScontains a detailed treatment of nuclear processesand reactions. There is a separate chapter on nu-clear fission. and the three most successful schemesfor isotope separation-mass spectrograph, thermaldiffusion, and exchange reaction-are discussed insome detail. The book is written in simple lan-guage, easily understood by those without special.ized training in advanced physics.

p-

v Typical Comments" For many years nuclear physicistshave wished for a book which theycould recommend to beginners in nu-clear physics and also to biologists,physicians, chemists, metallurgists, andothers with whom they were collaborat-ing on problems utilizing radioactiveor stable tracer isotopes. The needwas for a pleasantly-written, essen-tially non-mathematical, orientationcourse covering the fundamental ideasin nuclear physics, the properties ofstable and radioactive nuclei, and themethods and results of applying theseto practical problems. Pollard andDavidson meet these requirements. "-Journal of Applied Physics, July 1943

" 'Applied Nuclear Physics' is an ad-dition to the literature of physics, forit is the first authoritative book tomake generally available a large bodyof knowledge which hitherto has beenavailable only to specialists and re-search workers. The continually wid-ening applicability of nuclear phe-nomena and techniques accentuates theimportance of this book."'-AnericanJournal of Science, April 1944

"This welcome book signalizes the development of nuclear physics from a pure science toan applied science. The ideas of nuclear physics and the technique of radioactive mea-surements are here surveyed in a form usef al for chemists, biologists, and physiologistsas well as physicists. And if a technology of nuclear power shall develop after the warwe can expect to find this book in the hands of the employees of the new industry.'The Review of Scientific Instruments, October 1942

November 1942 249 pages 6 by 9¼4 $3.00

JOHN WILEY & SONS,. Inc., 440-4th Ave., New York 16, N. Y.

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SCIENCE-ADVERTISEMENTS 13AUGUST 24, 1945

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14 SCIENCE-ADVERTISEMENTS VOL.

| 9 ~~REINHOLD g'otSTUDIES- IN BIOPHYSICSThe Critical Temperature of SerumBy P. LECOMTE DU NOUYFormer Associate Member of Rockefeller Institute;Formerly Head of Dept. of Molecular Biophysics at the Pasteur Inst.;Director of Molecular Serology, University of Paris

Presents a detailed discussion of an experimental approach to the subject of immunology which hasbeen widely used in Europe, and offers his theory of the coagulation of serum by heat. The book'spurpose is primarily to lay a foundation for organizing and correlating the present knowledge of thisscience into a unified whole. Will be of great interest to all biochemists, physical chemists, specialistsin immunology and blood diseases, physicians and pharmacists. Contains 89 graphs and much tabulardata showing the results obtained on numerous series of experiments with various types of serum andplasma. Such properties as sedimentation, ionic equilibria, interfacial tension, density, conductivity,viscosity, coagulation, etc.,are discussed with special emphasis on the critical role played by temperature.185 Pages Illustrated $3.5 0

OUTLINE OF THE AMINO ACIDS AND PROTEINSEdited by MELVILLE SAHYUNVice-President and Director of Research, Frederick Stearns and Company,Detroit, Michigan

Everyone working in biological and chemical fields should have a fundamental appreciation of. theproperties and functions of these vital substances, upon which life itself depends. Proteins charac-terize all living matter, from viruses and molds to human flesh and blood. Twelve authorities onvarious aspects of proteins and amino acids under the editorship of Dr. Melville Sahyun, have producedthis comprehensive review of the field, stressing its practical definitive side and largely avoiding theo-retical and controversial details.25 1 Pages Illustrated $4.00

BIOCHEMISTRY OF THE FATTY ACIDSBy W. .. BLOORProfessor of Biochemistry and Pharmacology, the University of Rochester,Rochester, N. Y.

A dynamically important study of the vital group of substances included in the term "fatty acids,"this comprehensive critical review is of inestimable value to those in the food and pharmaceuticalfields, including physicians, nutritionists, organic chemists and biochemists.387 Pages Illustrated $6.00

Send Today for New Free 1945 Catalog, "Let's Look It Up"-(200 Titles)

REINHOLD PUBLISHING CORP.330 West 42nd Street New York li, N. Y.Also publishers of Chemical Engineering Catalog, Metal Industries Catalog, Metals and Alloys, and Pencil Points

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VOL. 102, NO. 264314 SCIENCE-ADVERTISEMENTS

AtIGUST 24, 1945 SCIENCE-ADVERTISEMENTS 15

zee

starts upon a successrul career

GENERAL CHEMISTRYBy JOHN ARREND TIMM

Professor of Chemistry and Director of School of Science, Simmons College

International Chemical Series

691 pages, 5¾/4 x 8¾/4, 185 illustrations. $3.75Already adopted by over 50 colleges and universities, and enthusiastically praisedby teachers everywhere, this distinctive text has quickly taken its place among

the few really top-notch books in the field of general chemistry.

What Teachers Say"I must say that I am delighted with the book. Profes-sor Timm's conversational style coupled with his abilityto introduce concepts by easy stages should go a longway toward stimulating and easing the path of the stu-dent. Descriptive and theoretical materials are skilfullyinterwoven and the treatment is refreshingly modern-and clear-throughout. Nor is it over-simplified."

Professor SIDNEY J. FRENCHColgate University

"It seems to me that the book is an excellent one. I amparticularly struck by its readability. The organic sec-

tion at the end I have read with care, and it seems tome that just enough, and of the right things, is includedfor a book of this kind."

Professor H. G. LINDWALLNew York University

`I have looked the book over carefully and consider ita very clear, thorough, and scholarly treatment of thefield."

Professor R. W. GETCHELLIowa State Teachers College

"This book appears to be very well written and thor-oughly up to date. The illustrations are particularlygood, especially the photographs showing arrangementsof atoms in molecules before and after reactions takeplace. The various line drawings and tables show thatmuch care has gone into their preparation. They add a

good deal to the value of the book."Professor WILLIAM LICHT, JR.University of Cincinnati

University ofArizonaBakersfield Junibr CollegeBard CollegeBoston Teachers CollegeBowdoin CollegeUniversity of California at Los

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Written in a vigorous, readable style and firmly based on sound scientific and pedagogicalprinciples, General Chemistry presents things clearly and graphically in a vivid manner thatgives zest to the course and inspiration to the student. The text is designed to meet theneeds of those students who plan to use chemistry in their professional education, and issuitable for use both by those who have had no previous course in chemistry and by thosewho have completed an elementary course in a secondary school.

Send for a copy on approval

McGRAW-HILL BOOK COMPANY, INC.330 West 42nd Street, New York 18, N. Y. Aldwycb House, London, W.C.2.

AUGUST 24, 1945 SCIENCE-ADVERTISEMENTS 15

U~~~~~PENICILLINMERCK

a record of performance

1940Merck research on anti-

biotics concentrated on Penicillin

1941 Merck helped spur pro.ductioin through a British-American reciprocal arrangement

1942 Merck supplied Penicillinfor first case of bacteriemia success

~~~~~~ ~~~~fully treated with Penicillin inAmerica

1942 Merck Penicillin rushedto Boston for Cocoanut Grove firecasualties

1943 Merck Penicillin flown toEngland for U. S. Army MedicalCorps

1943 Large-scale production ofPenicillin was established by Merckto meet Government requirements

1944 Merck Canadian plant pro-duced first commercial Penicillin by

fl hi Aat . 1 1 n 1 . *deep-fermentation process in Brit-Anota ce rro ue on AcnPevermen ish Empire1945 Merck supplies largequantities of Penicillin for civilianuse as well as for Armed Forces

N0 less impressive than the remarkable performance of Peni-cillin itself is the record of Penicillin manufacturers in sur-

mounting numerous obstacles to achieve large-scale production.In this notable production achievement, Merck & Co., Inc.

has been privileged to play a pioneering and progressively im-portant role. Basic discoveries made by Merck microbiologists,and shared with other Penicillin producers, contributed vastly tothe successful development of Penicillin manufacture. By apply-ing chemical engineering technics to the manufacture of thisdifficultly produced antibiotic agent, Merck independently suc-ceeded in devising and perfecting a practical method of large-scale production based on the mass-fermentation principle.

Penicillin Merck meets the recognized high standard of qualityestablished for all products bearing the Merck label.

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A universal Electro-Titrator using a highly stable and sensitive voltmetercircuit designed by Dr. R. L. Garman and Dr. M. E. Droz for determinations ofend-points in electrometric neutralization titrations (including pH determina-tions), oxidation-reduction titrations, and precipitation titrations.

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IN THE MARK ET PLACERATES to be paid in advance. Regular setting 10 a word, minimum charge $2.00 each; count 8 words if a box address isused. Display, 3 inches maximum, $8.80 per column inch. No discounts or commissions.SEND advertisements with remittance to the ADVERTISING DEPARTMENT, American Association for the Advancementof Science, SMITHSONIAN INSTITUTION BUILDING, WASHINGTON 25, D. C. Correct remittance must accom.pany instructions and copy and advertisements will be published in sequence of completed orders.ADVERTISERS are requested to mention in their announcements the section of the country in which a position is open or de-sired to ensure replies only from employers or prospective employees geographically available.SUBMIT copies, not original documents, when replying to advertisements. Advertising circulars will not be-forwarded and tothat end all letters will be opened for inspection at the forwarding office.

POSITIONS OPEN

RESEARCH DIRECTORMiddle-west organization with diversifiedline of products and ample resources wantsman with background and experience toorganize and direct research laboratory.Must have basic knowledge in modernphysics, coupled with a general knowledgeof modern industrial processes and ma-terials, and preferably experience in metal-lurgy. Should be able to plan industrialresearch programs and direct their solution.Future only limited by ability.

Box 209 SCIENCE

Smithsonian Institution BuildingWashington 25, D. C.

UNIVERSITY OF OXFORDWYKEHAM PROFESSORSHIP

OF PHYSICSApplications (eight copies) giving three

referees but not enclosing testimonials, areinvited for the above Professorship and shouldreach the University Registrar, Old ClarendonBuilding, Broad Street, Oxford, England, bySeptember 29, 1945. Present stipend of Pro-fessorship £1,200 per annum, plus children 'sallowances, but it will be included in the re-vision of stipends now under consideration.Residence in Oxford required during sixmonths between October and August in eachacademic year. Retiring age 65. Duties in-clude original work and general supervision ofresearch and advanced work in TheoreticalPhysics. Minimum of 36 Lectures or classesin each academical year required. Furtherparticulars may be obtained on application to:

The REGISTRARUniversity Registry Oxford, England

Chemist, B.S. or M.S. for literature and patentsearches, midwestern pharmaceutical house, youngwoman preferred. Box 216, "SCIENCE," Smith-sonian Institution Building, Washington 25, D. C.

Pharmacologist or Physiologist, Bachelor's orMaster 's degree in these or related sciences, totake permanent position in modern research labora-tory Eastern New Jersey. Salary according to ex-perience and training. Opportunity for individualof high caliber. Box 196, " SCIENCI," SmithsonianInstitution Building, Washington 25, D. C.

POSITIONS OPEN

Opportunities Available-(a) Director, divisionof physiology and pharmacology, research founda-tion; problems restricted to pharmacologicaland physiological studies in investigative sphereof human and animal reproductive systemsand are concerned with application of chemo-therapeutic agents for evaluation in animalsand humans; duties comparable to those of as-sociate professor in pharmacology. (b) Associ-ate professor of bacteriology; relatively youngman, preferably physician; Ph.D. eligible; teachingexperience and ability in research required; uni-versity medical center; South. (c) Research assis-tant; department of physiology, university medicalschool; duties consist of collaborating in researchproblem concerned with physiology of vascularsystem; will be co-author of reports based uponwork; college chemistry, physics, biology, andmedical physiology desirable qualifications. (d)Professor of chemistry; preferably some one ex-perienced in medical school teaching; small co-educational college; South. (e) Clinical investi-gator; young physician with investigative ability,principal problem concerned with action of certaindrugs in treatment of thyroid diseases; departmentof surgery, university medical school. (f) In-structor in physiology; duties include assisting ininstruction of medical students and in research onintestinal physiology; South. (g) Bacteriologist,preferably recent graduate with Ph.D. degree, forresearch in field of chemotherapy; biological re-search department of large industrial company;vicinity New York. (h) Physician thoroughlyfamiliar with malaria and its attendant problems;should be familiar with general measure of sanita-tion imperative to control of tropical diseases aswell as their diagonsis and treatment; medical staff,large American company; Latin America. S8-4Medical Bureau (BURNEICE LARSON, Director),Palmolive Building, Chicago 11.

We still have considerable stock of Gruebler Stainsand Kahlbaum Chemicals. Write for quotations.AKATOS, INC., 55 Van Dam St., New York 13, N. Y.

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Opportunities Wanted-Biochemist; B.S. in chem-istry; five years' graduate study; Ph.D. (majorin biochemistry; minor, physiology); experience hasconsisted of several years as research chemist in de-partment of pathology of large teaching hospitaland several years in charge of clinical chemistry;for further information, please write BURNEICELARSON, Director, Medical Bureau, Palmolive Build-ing, Chicago 11.Entomologist, Ph.D. desires contacts for possiblepostwar employment. Interested in universityteaching with opportunity to develop courses andresearch in medical entomology; or full time re-search. At present in Army Sanitary Corps.Publications. Now on leave from A-1 State Univer-sity. Desires better position. Box 213, "Sci-ENCE, " Smithsonian Institution Building, Wash-ington 25, D. C.Young man, 28, M.S., bacteriologist, chemistryminor, four years research experience, seeks researchor teaching position to permit study toward Ph.D.degree. Experience with antibiotics. References,publications. At present Instructor, Dairy Dept.,Eastern University. Available immediately. Box210, "SCIENCE," Smithsonian Institution Building,Washington 25, D. C..Physiologist Psychologist available. Ph.D. spe-cialist in design, construction and standardizationof psychological and medical instruments. Desiresposition with psychological or medical instrumentcompany. Salary $8,000. Box 212, " SCIENCE, "Smithsonian Institution Building, Washington 25,D. C.Opportunities Wanted-Biochemist; A.B. (Major-chemistry; minors-physics and zoology), Ph.D.(major-biochemistry, minors-organic chemistryand zymology); four years in research laboratoriesof large pharmaceutical company; research hasconcerned itself largely with synthetic drugs andbacteriostatic agents; for further informationplease write BURNEICE LARSON, Director, MedicalBureau, Palmolive Building, Chicago 11.Chemist, B.S., 1943. Experience in analytical re-search; two years research and development inpurification and recovery of antibiotics; other bio-chemical experience. Desire position with soundfuture in research or development along lines ofpast experience. Single, 24, 4F. N. Y. area.Present salary $3000. Box 217, "SCIENCE,"Smithsonian Institution Building, Washington 25,D. C.

POSITIONS WANTEDPhysiologist, Ph.D., age 38, married. Fourteenyears teaching since first instructorship; now associ-ate professor in charge of courses of human, generaland comparative physiology. Also taught compara-tive anatomy. Published 32 research papers total-ing 270 pages; 3 articles in press; 7 papers inpreparation. Desires change to institution withsincere interest in support of good teaching. Per-fectly willing to do research if working schedule isso arranged. However, would like time and oppor-tunity to summarize for publication existing litera-ture in comparative physiology rather than addingmore pages of uncorrelated data. Box 214, "Sci-ENCE," Smithsonian Institution Building, Wash-ington 25, D. C.Microbiologist-Biochemist: Ph.D. ten years' ex-perience in industrial research. Desires academicor industrial research position in industrial oragricultural microbiology. Age 40. Married.Box 211, "SCIENCE,'" Smithsonian InstitutionBuilding, Washington 25, D. C.Pharmacologist, Ph.D., being discharged by theArmy. Two years' Industrial experience and oneyear post doctorate research. Box 221, " SCI-ENCE, " Smithsonian Institution Building, Wash-ington 25, D. C.

BUSINESS OPPORTUNITIESTwo associates (scientists) wanted for purchase ofdormant eastern college charter and founding ofnew institution. Address "EDUCATOR," d/o New-mark's, 217 Seventh Avenue, N. Y.Technician: experience in RF induction work; highvacuum; optical coating; metal evaporation; bio-logical; physiological; ideas. M.A. Desires in-vestment proposition with services in New YorkCity or vicinity. Or assisting on salary or fee basis-from 3:30 PM daily, including all day Saturday.Box 215, - SCIENbE," Smithsonian InstitutionBuilding, Washington 25, D. C.

PERIODICALSWanted to purchase Scientific Periodicals, For-eign-Domestic. WALTER J. JOHNSON, 125But 23rd Street, New York 10, New York.For Sale: Medical, Chemical, and Scientific Peri-odicals. Sets, volumes, copies. B. LOGIN ANDSON, INC. Established 1887, 29 East 21st StNew York 10.Wanted to Buy-Scientific Periodicals in Chem-istry, Physics, Biology, and other sciences. NationalGeographic Magazines before 1915. PeriodicalService, Box 327, Swarthmore, Pennsylvania.

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American.. OpticalScierntificanstrumeft Division- Buffalo I1, NewYork

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