Texts that offer today'sknowledge of histology

HISTOLOGYBy Arthur W. Ham, M.B., F.R.S.C.

The latest histologic knowledge is re.flected in the new fifth edition of thiswidely-used book. The tremendous stridesin the interpretation of fine structure madepossible by the electron microscope arefully detailed. A new section deals withthe chemical components of tissue; threechapters are now devoted to cell struc-ture and cell biology; and new materialhas been incorporated on the cellular basisof immunologic reactions. The chapterswhich discuss myeloid tissue, bone, muscle,endocrine glands, and the liver have alsobeen heavily revised in accordance withthe latest information. There are 140 newillustrations.

1,041 Pages 676 Illustrations5 in Color

New 5th Edition, 1965 $13.50

ATLAS OF HISTOLOGYBy Sam J. Piliero, Ph.D.; Myron S. Jacobs,Ph.D.; and Saul Wischnitzer, Ph.D.

A magnificent collection of photomicro-graphs (with accompanying explonatorytext) depicting the whole range of finestructure of human organs and tissues. Theorganization of the Atlas is such that eachseries of figures pertaining to a structureis usually presented first at low, then atintermediate, and finally at high power.Electron micrographs are included to em-phasize the fact that microstructure goesfar beyond the limits of resolution of thelight microscope.

401 PagesNew, 1965

175 Plates$7.50

J. B. LIPPINCOTT COMPANYEast Washington SquarePhiladelphia, Pennsylvania 19105

In Canada:4865 Western Ave., Montreal 6. P.Q.Please send me:

D HISTOLOGY (New 5th Ed.)$13.50

D] ATLAS OF HISTOLOGY$7.50

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conf., Cleveland, Ohio. (A. F. Leatherman,Battelle Memorial Inst., 505 King Ave.,Columbus, Ohio 43201)

28-30. German Soc. for Documentation,17th annual, Constance, Germany. (TheSociety, Schubertstr. 1, Frankfurt am Main,Germany)

28-30. Physics and Nondestructive Test-ing, symp., Dayton, Ohio. (D. W. J. Mc-Gonnagle, IIT Research Inst., 10 W. 35St., Chicago, Ill. 60616)

28-30. Industrial and CommercialPower Systems, conf., Buffalo, N.Y. (J. A.Hart, Allison Div., General Motors Corp.,Box 894, Indianapolis 6, Ind.)

28-1. Experimental Mechanics, 2nd in-tern. congr., Washington, D.C. (J. L.Jones, Soc. for Experimental Stress Anal-ysis, 21 Bridge Sq., Westport, Conn. 06880)

28-1. Society for Experimental StressAnalysis, Washington, D.C. (B. E. Rossi,21 Bridge Sq., Westport, Conn.)

28-1. Inhaled Particles and Vapors,Cambridge, England. (J. S. McLintock,Medical Service, Natl. Coal Board, HobartHouse, Grosvenor P1., London S.W.1)

28-1. Medical Electronics, Europeansymp., Brighton, England. (J. Pearce, 4Mill St., London W.1)

28-2. Hyperpure Materials in Scienceand Technology, Inst. for Applied Physicsof Hyperpure Materials, Dresden, Ger-many. (The Institute, Dresden A 20, Win-terbergstr. 28, East Germany)

29-1. German Soc. for Aviation andSpace Medicine, intern. congr., Munich,Germany. (H. von Diringshofen, GermanSoc. for Aviation and Space Medicine,Silcherstr. 6, Munich 13)

29-1. Analytical Chemistry, symp.,Graz, Austria. (Prof. Gutmann, AustrianAssoc. for Microchemistry and AnalyticalChemistry, Eschenbachgasse 9, Vienna 1)

29-i. European Atomic Forum, 2ndcongr., Frankfurt am Main, Germany.(European Atomic Energy Forum, 26, ruede Clichy, Paris 9)

29-1. American Vacuum Soc., 12th an-nual symp., New York, N.Y. (R. L. Jepsen,Varian Associates, 611 Hansen Way, PaloAlto, Calif.)

October

1-3. French-Language Assoc. of Scien-tific Psychology, 10th study sessions, Mar-seilles, France. (P. Fraisse, The Associa-tion, Inst. de Psychologie, 28, rue Serpente,Paris 61)

1-11. International Scientific Film Assoc.,19th annual congr., Bucharest, Rumania.(ISFA, 38, avenue des Termes, Paris 17',France)

2. Association of Clinical Biochemists,annual, London, England. (D. W. Moss,Postgraduate Medical School, DucaneRd., ILondon, W.12)

3-5. Refractory Metals, 4th symp.,French Lick, Ind. (J. Maltz, MaterialsResearch Div., NASA, 600 IndependenceAve., SW, Washington, D.C. 20546)

3-7. American Phytopathological Soc.,Miami Beach, Fla. (J. R. Shay, Dept. ofBotany and Plant Pathology, PurdueUniv., Lafayette, Ind.)

3-8. Clinical Pathology, 6th intern.congr., Rome, Italy. (B. L. Della Vida,Via de'Penitenzieri 13, Rome)

3-9. Water Desalination, 1st intern.

symp., Washington, D.C. (Atomic Indus-trial Forum, 850 Third Ave., New York10022)

4-5. Enzyme Regulation, 4th intern.symp., Indiana Univ., Indianapolis. (G.Weber, Indiana Univ. School of Medicine,Indianapolis 46207)

4-5. Physical Metallurgy of RefractoryMetals, conf., American Inst. of Mining,Metallurgical, and Petroleum Engineers,French Lick, Ind. (AIME, 345 E. 47 St.,New York 10017)

4-6. Electronics, Canadian conf., To-ronto, Ont. (W. M. Lower, 1819 YongeSt., Toronto)

4-6. Industrial Organic Analysis, Ana-lytical Chemistry Div., Chemical Inst. ofCanada, Sarnia, Ont. (R. M. Small, Re-search Dept., Polymer Corp, Sarnia)

4-6. International Scientific Radio Un-ion/Inst. of Electrical and ElectronicsEngineers, fall meeting, Dartmouth Col-lege, Hanover, N.H. (IEEE, Box A, LenoxHill Station, New York, N.Y.)

4-7. Instrument-Automation Conf., LosAngeles, Calif. (E. M. Grabbe, InstrumentSoc. of America, 530 William Penn P1.,Pittsburgh, Pa. 15219)

4-7. Otorhinolaryngology, 62nd Frenchcongr., Paris, France. (H. Guillon, 6, ave-nue Mac-Mahon, Paris 16')

4-7. Research Equipment, exhibit andinstrument symp., 15th annual, Bethesda,Md. (J. B. Davis, Natl. Institutes ofHealth, Bethesda, Md. 20014)

4-7. International Committee for SocialSciences Documentation, annual plenaryassembly, Budapest, Hungary. (J. Meyriat,27, rue St. Guillaume, Paris 7)

4-8. Aeronautic and Space Engineer-ing, Soc. of Automotive Engineers, LosAngeles, Calif. (C. C. King, SAE WesternBranch, 999 North Sepulveda Blvd., ElSegundo, Calif. 90245)

4-8. Ciba Foundation Clinical ResearchGuest Conf., London, England. (Ciba, 41Portland P1., London W.1)

4-10. Physicists, conf., Frankfurt amMain, Germany. (G. Schubert, Inst. furTheoretische Physik, Universitlit, Mainz,Germany)

4-13. International Council for theExploration of the Sea, 53rd annual meet-ing, Rome, Italy. (The Council, Charlot-tenlund Slot, Charlottenlund, Denmark)

4-13. Commonwealth Medical Conf.,Edinburgh, Scotland. (Mrs. J. Hotchkiss,Ministry of Overseas Development, StagPlace, London, S.W. 1, England)

5-7. Industrial and Commercial PowerSystems, conf., Buffalo, N.Y. (T. 0. Zittel,Bethlehem Steel Co., 3555 Lake ShoreRd., Buffalo 14219)

5-8. International Committee of Weightsand Measures, session, Sevres, France.(Intern. Bureau of Weights and Measures,Pavillon de Breteuil, Sevres, Sein-et-Oise,France)

5-9. Infectious Pathology, 4th intern.congr., Freiburg im Breisgau, Germany.(G. Mossner, Hugerterstr. 55, Freiburgim Breisgau)

5-9. Tuberculosis, 18th intern. conf.,Munich, Germany. (Intern. Union AgainstTuberculosis, 15, rue Pomereu, Paris 16',France)

6-8. Dynamics of Fluids and Plasmas,symp., Univ. of Maryland, College Park.(S. I. Pai, Inst. for Fluid Dynamics and

SCIENCE, VOL. 149

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Buenos Aires)11-13. Color Centers in Alkali Halides,

symp., Univ. of Illinois, Urbana. (D. W.Compton, Dept. of Physics, Univ. ofIllinois, Urbana)

SCIENCE, VOL. 149

Applied Mathematics, Univ. of Maryland,College Park 20742)

6-8. Optical Soc. of America, annualmeeting, Philadelphia, Pa. (M. E. Warga,OSA, 1155 16th St., NW, Washington,D.C. 20036)

6-8. Royal Inst. of Public Health andHygiene, annual conf., Weymouth, Eng-land. (Secretary, RIPHH, 28 PortlandPlace, London, W.1, England)

6-10. Wood and Organisms. intern.symp., Berlin, Germany. (German Soc.for Wood Research, Danneckerstr. 37,Stuttgart S, Germany)

7-9. Seismological Soc. of America,eastern sec. 37th annual, Lamont Geolog-ical Observatory, Palisades, N.Y. (J. Dor-man, Lamont Geological Observatory,Palisades 10964)

8-9. Atlantic Coastal Plain GeologicalAssoc., field trip, South Carolina. (D. J.Colquhoun, Dept. of Geology, Univ. ofSouth Carolina, Columbia)

8-9. Association of Midwestern CollegeBiology Teachers, 9th annual conf.,Northern Illinois Univ., DeKalb)

8-9. Indiana Acad. of Science, fallmeeting, Notre Dame. (C. F. Dineen, St.Mary's College, Notre Dame)

9. Paleontological Research Inst., Ith-aca, N.Y. (K. V. W. Palmer, Paleontolog-ical Research Inst., 109 Dearborn P1.,Ithaca)

9-10. Gastroenterology, French conf.,Paris, France. (R. Biguie, 79, BoulevardMalesherbes, Paris 8')

9-13. American Soc. of Clinical Hyp-nosis, Chicago, Ill. (F. D. Nowlin, ASCH,800 Washington Ave., SE, Minneapolis,Minn. 55414)

9-17. Electrical, Electronics, and Me-chanical Engineering, first Pan Americancongr., Mexico, D.F. (Inst. of Electricaland Electronics Engineers, Box A, LenoxHill Station, New York 10021)

10-14. Water Pollution Control Fed.,38th annual, Atlantic City, N.J. (R. E.Fuhrman, 4435 Wisconsin Ave., NW,Washington, D.C. 20016)

10-15. International Federation forDocumentation, congr., Washington, D.C.(Secretariat, FID, 9650 Wisconsin Ave.,Washington 20014)

10-15. Electrochemical Soc., meeting,Buffalo, N.Y. (Executive Secretary, ES, 30E. 42 St., New York 10017)

10-15. Endocrinology, 6th Pan Amer-ican conf., Mexico, D.F. (G. Gual, Inst.Nacional de la Nutricion, Dr. JimenezNo. 261, Mexico 7)

10-16. American Documentation Inst.,Washington, D.C. (J. E. Bryan, 2000 PSt., NW, Washington, D.C. 20036)

10-1 7. Bronchoesophagology, 1st LatinAmerican congr., Rio de Janeiro, Brazil.(F. Aprigliano, Rua Alcindo Guanabara,24, Sob-Loja 206, Rio de Janeiro)

10-17. Otorhinolaryngology, 14th Bra-zilian congr., Rio de Janeiro, Brazil. (W.Benevides, Rua Alcindo Guanabara, 24,Sob-Loja 206, Rio de Janeiro)

10-17. Plastic Surgery, 10th LatinAmerican congr., Buenos Aires, Argen-tina. (J. Norberto Spera, Riglos 624,

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13-17. Soil Biology, first Latin Ameri-can colloquium, Bahia Blanca, Argentina.(Organizing Committee, Inst. de Edafolo-gia e Hidrologia, Alem 925, Bahia Blanca,Argentina)

11-13. Communications, 11th natl.symp., Utica, N.Y. (G. E. Brunette, Com-munications Div. (EMCT) Rome Air De-velopment Center, Griffiss AFB, NewYork 13442)

11-13. Metabolic Roles of Lipids,symp., Cincinnati. Ohio. (C. H. Hauber,American Oil Chemists' Soc., 35 EastWacker Dr., Chicago 1, III.)

11-13. Manned Spaceflight, 4th meet-ing, St. Louis, Mo. (J. F. Yardley, McDon-nell Aircraft Corp., P.O. Box 516, St.Louis)

11-13. National Acad. of Sciences, fallmeeting, Univ. of Washington, Seattle.(H. Neurath, Dept. of Biochemistry, Univ.of Washington, Seattle 98105)

11-13. American Record ManagementAssoc., 10th annual conf., Minneapolis,Minn. (L. Loveless, Office Services, Honey-well, Inc., 2701 Fourth Ave., S, Minneapo-lis 55408)

11-14. Association of Official Agri-cultural Chemists, 79th annual, Washing-ton, D.C. (L. G. Ensminger, AOAC, Box540, Benjamin Franklin Station, Wash-ington 20044)

11-14. American Oil Chemists' Soc., fallmeeting, Cincinnati, Ohio. (AOCS, 35 E.Wacker Dr., Chicago, Ill. 60600)

11-15. Fall Metallurgy Days, Paris,France. (Soc. Frangaise de Metallurgie,25 rue de Clichy, Paris 9")

11-16. Stomatology, 19th French congr.,Paris. (R. Cayron, 99, rue de Courcelles,Paris 17")

11-23. International Organization forStandardization, Milan, Italy. (Soc. of Mo-tion Picture and Television Engineers, 9E. 41 St., New York 10017)

12-13. Cardio-Renal Consequences ofSustained Hypertension, seminar, Phila-delphia, Pa. (Miss S. Rosen, SymposiumOffice, Hahnemann Medical College andHospital, 230 N. Broad St., Philadelphia19102)

12-14. Analytical Chemistry in NuclearTechnology, 9th conf., Gatlinburg, Tenn.(C. D. Susano, Oak Ridge Natl. Labor-atory, P.O. Box X, Oak Ridge, Tenn.37831)

12-16. Communications, 13th intern.congr., Genoa, Italy. (Inst. for Intern.Communications, Viale Brigate Partigiane,18, Genoa)

13. Medical Physics, seminar, NewYork, N.Y. (American Inst. of Physics,335 E. 45 St., New York 10017)

13. Animal Nutrition Research Council,26th annual, Washington, D.C. (J. C.Fritz, 12314 Madeley Lane, Bowie, Md.20715)

13-15. Detonation, 4th symp., WhiteOak, Silver Spring, Md. (S. J. Jacobs,U.S. Naval Ordnance Laboratory, WhiteOak, Silver Spring 20910)

13-15. American Assoc. of PetroleumGeologists, mid-continent regional meet-ing, Tulsa, Okla. (E. W. Ellsworth, AAPG,Box 979, Tulsa 74101)

13-16. Tau Beta Pi Assoc., Inc., Univ.of Maryland, College Park. (R. H. Nagel,508 Dougherty Engineering Bldg., Univ.Of Tennessee, Knoxville)

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13-19. Instrumentation and Automa-tion, 3rd intern. congr., Dusseldorf, Ger-many. (Nordwestdeutsche Ausstellungs-und-Messe-Gesellschaft, Ehrenhof 4, 4000Dusseldorf 10)

14. Association of Vitamin Chemists,Chicago, Ill. (D. Olson, Dawe's Labora-tories, 4800 S. Richmond St., Chicago)

14-15. International Federation of Sur-gical Colleges, 8th annual, Philadelphia,Pa.: 17, Atlantic City, N.J. (K. Cassels,Royal College of Surgeons, Lincoln's InnFields, London W.C.2, England)

14-16. British Orthopaedic Assoc., fallmeeting, London, England. (Joint Secre-tariat, 47 Lincoln's Inn Fields, London,W.C.2)

15. Southern California Acad. of Sci-ence, Los Angeles. (C. Rozaire, Los An-geles County Museum, 900 ExpositionBlvd., Los Angeles 90007)

15-16. Contributions of Cytogenetics tothe Determination of Phylogenies, 12thsymp., Missouri Botanical Garden, St.Louis. (H. C. Cutler, Missouri BotanicalGarden, St. Louis 63110)

15-16. National Soc. of ProfessionalEngineers, 3rd annual conf., OklahomaCity, Okla. (NSPE, 2029 K St., NW,Washington 20006)

15-17. American Heart Assoc., Scien-tific sessions, Bal Harbour, Fla. (AHA, 44E. 23 St., New York 10010)

16-17. Infectious Diseases Soc. ofAmerica, Washington, D.C. (E. H. Kass,IDS. Boston City Hospital, Boston. Mass.02118)

17-21. Antimicrobial Agents and Chem-otherapy, 5th interscience conf./4th intern.congr. of chemotherapy, Washington, D.C.(R. W. Sarber, American Soc. for Micro-biology, 115 Huron View Blvd., AnnArbor, Mich.)

17-21. Metallurgical Soc. of AmericanInst. of Mining, Metallurgical, and Petro-leum Engineers, Detroit, Mich. (Ameri-can Inst. of Mechanical Engineers, 345E. 47 St., New York 10017 )

18. Industrial Pharmacy sect., AmericanPharmaceutical Assoc., 4th annual mid-west regional meeting, Chicago, Ill. (C.Schroeter, Abbott Laboratories, NorthChicago. Ill.)

18-19. American Inst. of Aeronauticsand Astronautics/ Canadian Aeronauticsand Space Inst., Toronto, Ont., Canada.(D. I. Raymond, 1290 Sixth Ave., NewYork 10019)

78-19. Systems Science, conf.. CaseInst. of Technology, Cleveland, Ohio.(Inst. of Electrical and Electronics Engi-neers, Box A, ILenox Hill Station, NewYork 10021)

18-20. Dynamic Stability of Structures,intern. conf., Evanston, Ill. (G. Herrmann,Technological Inst., Northwestern Univ.,Evanston 60201)

18-20. Electromagnetic Radiation inAgriculture, intern. conf., Roanoke, Va.(D. P. Brown, Niagara Mohawk PowerCorp., 300 Erie Blvd. W., Syracuse, N.Y.13202)

18-20. American Soc. of LubricationEngineers, San Francisco, Calif. (D. B.Sanberg, 5 North Wabash Ave.. Chicago,Ill.)

18-20. Canadian Inst. of Mining andMetallurgy, annual western meeting, Win-nipeg, Canada. (CIMM, 906 Drummond

Bldg., I1 17 St. Catherine St. W., Montreal2, P.Q., Canada)

18-20. Nuclear Science, 12th symp.,San Francisco, Calif. (Inst. of Electricaland Electronics Engineers, Box A, LenoxHill Station, New York 10021)

18-20. Applied Spectroscopy, 12thsymp., Ottawa, Ont., Canada. (R. V.Baker, Aluminum Co. of Canada, Arvida,P.Q., Canada)

18-21. Advances in Gas Chromatog-raphy, 3rd intern. symp., Houston, Tex.(A. Zlatkis, Dept. of Chemistry, Univ. ofHouston, Houston)

18-21. Management Information andData Transfer Systems, American Univ.,Washington, D.C. (R. I. Cole, Center forTechnology and Administration, AmericanUniv., 2000 G St., NW, Washington, D.C.)

18-22. American Soc. of Civil Engi-neers, Kansas City, Mo. (W. H. Wisely,ASCE, 345 E. 47 St., New York 10017)

18-22. Society for Nondestructive Test-ing, 25th natl. conv., Detroit, Mich. (N.H. Cale, Anaconda American Brass Co.,Research and Technical Center, P.O. Box747, Waterbury, Conn.)

18-22. American Public Health Assoc..93rd annual, Chicago, Ill. (APHA, 1790Broadway, New York, N.Y.)

18-22. Radioisotope Instruments in In-dustry and Geophysics, Warsaw, Poland.(J. H. Kane, Div. of Special Projects, U.S.Atomic Energy Commission, Washington,D.C.)

18-22. American Soc. for Metals, nati.congr., Detroit, Mich. (A. R. Putnam,ASM, Metals Park, Ohio)

18-22. Application of Radioisotopes inGastroenterology, symp., Lausanne, Switz-erland. (A. Vannotti, Clinique MedicaleUniversitaire, Hopital Cantonal, Lausanne)

18-22. American College of Surgeons,annual clinical congr., Atlantic City, N.J.(American College of Surgeons, 55 EastErie St., Chicago, Ill. 60611)

19-20. International Rhinologic Soc.,1 st congr., Kyoto, Japan. (H. A. E. vanDishoeck, Academisch Ziekenhuis, Leiden,Netherlands)

19-21. Association of Analytical Chem-ists. 13th conf., Detroit, Mich. (G. Schenk,Dept. of Chemistry, Wayne State Univ.,Detroit 48202)

19-21. Cloud Physics and SevereStorms, conf., American MeteorologicalSoc., Reno, Nev. (K. C. Spengler, 45Beacon St., Boston 8, Mass.)

19-211. Radio Astronomical and SatelliteStudies of the Atmosphere, 2nd symp.,Boston, Mass. (G. A. Cushman. Went-worth Inst., 550 Huntington Ave.. Boston)

19-22. Economics of Automatic DataProcessing, symp., Rome, Italy. (Intern.Computation Center, Viale della Civiliadel Lavoro, 23, P.O.B. 10053, Rome)

20-2 1. Airborne Infection. 2nd intern.symp., Johns Hopkins School of Medicine,Baltimore, Md. (E. K. Wolfe, Fort De-trick, Frederick, Md. 21701)

20-21. International Soc. of Audiology.2nd congr., Kyoto, Japan. (M. Goto, Dept.of Otolaryngology, Kyoto Univ., Shogoin,Sakyo-ku, Kyoto)

20-22. Circuit and System Theory. Al-lerton Conf., Univ. of Illinois, Monticello.(M. E. Van Valkenburg, Dept. of Elec-trical Engineering, Univ. of Illinois, Ur-bana 61803)

SCIENCE, VOL. 149

Applied MathematiciansOperations AnalystsApplied Physicists

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Brook, N.J.)25-29. Hypotensive Polypeptides, intern.

symp., Florence, Italy. (E. G. Erd6s, Dept.of Pharmacology, Univ. of OklahomaMedical Center, Oklahoma City 73104)

17 SEPTEMBER 1965

20-22. Design of Experiments, 11thconf., Hoboken, N.J. (F. G. Dressel, ArmyResearch Office-Durham, Box CM, DukeStation, Durham, N.C. 27706)

20-22. Parenteral Drug Assoc., annualconv., New York, N.Y. (PDA, WesternSaving Fund Bldg., Broad and ChestnutSt., Philadelphia, Pa. 19107)

21. New Mexico Acad. of Science, Al-buquerque. (K. S. Bergstresser, 739 42ndSt., Los Alamos, N.M.)

21-22. Copolymer conf., Ludwigshafen,Germany. (Deutsche Bunsen-Gesellschaftfur Physikalische Chemie, Varrentrappstr.40-42, 6 Frankfurt am Main, Germany)

21-22. Electrochemical Current Sources,symp., Frankfurt am Main, Germany.(Gesellschaft Deutscher Chemiker, Post-fach 9075, 6 Frankfurt am Main)

21-23. Microminiaturization in Auto-matic Control, symp., Munich, Germany.(G. Muller, Siemens & Halske AG. Wer-nerwerk fur Messtechnik, Postfach 834,Karlsruhe, Germany)

21-23. Society of Photographic Scien-tists and Engineers, symp., Washington,D.C. (W. S. Dempsey, Houston FearlessCorp., 1413 K St., NW, Washington20005)

22-23. Data Processing in Public Libra-ries, conf., Drexel Inst. of Technology,Philadelphia, Pa. (M. D. Warrington,Graduate School of Library Science,Drexel Inst. of Technology, Philadelphia19104)23-28. American Acad. of Pediatrics,

annual, Chicago, Ill. (R. G. Frazier, AAP,1801 Hinman Ave., Evanston, Ill. 60204)24-27. Society of American Foresters,

annual, Detroit, Mich. (Society of Amer-ican Foresters, 1010 16th St., NW, Wash-ington 20036)

24-29. Stable Isotopes, 4th symp.,Leipzig, East Germany. (Inst. fur StabileIsotope, Deutsche Akademie der Wissen-schaften, Permoserstr. 15, 705 Leipzig)

24-30. American College of Gastroen-terology, Bal Harbour, Fla. (D. Weiss,33 W. 60 St., New York 10023)

25-27. Chemical Engineering, l5thconf., Quebec, Que., Canada. (ChemicalInst. of Canada, 48 Rideau St., Ottawa 2,Ont.)

25-27. Functional Organization of theCompound Eye, symp., Karolinska Inst.,Stockholm, Sweden. (W. E. Savely, AirForce Office of Scientific Research, Wash-ington, D.C. 20333)

25-27. Electrical Insulation, Natl. Acad.of Sciences-Nat. Research Council conf.,Buck Hill Falls, Pa. (D. W. Thornhill,NAS, 2101 Constitution Ave., NW, Wash-ington, D.C.)

25-27. Electronics, natl. conf., Chicago,Ill. (R. G. Brown, Dept. of ElectricalEngineering, Iowa State Univ., Ames50010)

25-27. Nuclear and Engineering Ceram-ics, conf., Harwell, England. (G. H.Stewart, British Ceramic Soc., SheltonHouse, Shelton, Stoke-on-Trent, England)

25-27. Society of Rheology, Case Inst.of Technology, Cleveland, Ohio. (J. C.Miller, Union Carbide Plastics Co., Bound

That's Noise! Your electronic signal maycontain the information you want, but un-related noise may be obscuring it. Re-gardless of the frequency range of thenoise and signal, Enhancetron will clarifythe picture.

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ENHANCETRON® Portable Signal Averag-ing Digital Computer, with 1024-wordmagnetic core memory.Let us clear up questions you have. Writeus for ENHANCETRON literature.

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IN NUCLEAR DATA INC120 WEST GOLF ROAD, PALATINE, ILL. 60067

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PharmacologicDo you need, BohmslBilochemnist

RIVANOL? tunt;ilPh. l.The Chemical name is Our continuing expansion has created an interesting

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MR. JOHN W. HONE, JR.90 Park Avenue, New York, N.Y. 10616

HOFFMANN-LA ROCHE INC.Nutley, New Jersey 07110An Equal Opportunity Employer

Preise ControI| ILITERATUREwith instruments CHEMISTS

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group, located in midtownManhattan, has an immediate

opening for a Literature Chemist.Responsibilities will include

searching, abstracting, indexingand classifying a broad

spectrum of technical materialfrom published and confidential

Model CSF sources. The position requiresMETALLOGRAPH a B. S. in Chemistry, with at leastMICROSCOPE one year of organic chemistry.A small, compact, easy to handle unit for normal metallo- Experience as a literaturegraphic work with sharp, bright magnifications up to 1500 X. searcher or chenmical abstractorPhotographs are recorded on plates 21/2½" X 31/2 ". Reflex camera is desirable but not essential.with tilting mirror throws image alternately on plate, filmholder EducationalA.ssistanceor on the ground glass screen. Built-in 30 watt light source.Optical kit for normal brightfield work consists of: infinity cor- Relocation Allowance...rected objectives 10 x, 40 x and 100 x; visual eyepieces 5 x and Outstanding Benefits. ..10 x. Photographic eyepieces give total magnifications: 50 x, If you are interested in this75 x, lOOx, 200 x, 50OOx and 1000 x. challenging opportunity, pleaseWith Plain Stage, $870.00; With Mechanical Stage $955.00 sendag completertsumen toAccessories available: Polaroid 35mm and other size film attachments. H. R. Wynne. Dept. N-917Also dark field objectives and photographic eyepiece up to 1500 x.

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.............. VI

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