Yellow Springs Instrument Co., Inc

There is a YSI precision conductivity in- strument to make your measurements precisely, reliably and effortlessly in both field and lab. Write for the...
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Measuring Conductivity and Salinity is as simple as a YSI . . . Model 31 Conductivity Bridge, laboratory standard for fast, accurate conductivity and resistance measurements.

. . . Model 32 Conductance Meter, field/lab digital readout of conductance, temperature, and temperature-compensated conductance.

. . . Model 33 S-C-T Meter, measures salinity, conductivity and temperature in the field or in the lab.

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There is a YSI precision conductivity instrument to make your measurements precisely, reliably and effortlessly in both field and lab. Write for the new YSI catalog.

Scientific Division Yellow Springs Instrument Co., Inc. Yellow Springs, Ohio 45387

P.O. Box 133, Swarthmore, Pa. 19081. 215-387-2255 Advanced Analytical Concepts for the Clinical Laboratory. April 24-25. Oak Ridge National Laboratory, Oak Ridge, Term. Contact: Charles D. Scott, Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tenn. 37830. November, page 1341 A 1st International Workshop on T r a c e Element Analytical Chemistry in Medicine and Biology. April 27-29. Neuherberg, Fed. Rep. of Germany. Contact: P. Schramel, Gesellschaft fuer Strahlen- und Umweltforschung Physikalisch-Technische Abteilung, Ingolstadter Landstras.se 1, U-8042 Neuherberg, F.R. Germany. October, page 1198A Biochemische Analytik 80: European Conference on Biochemical and Instrumental Analysis. April 29-May 2. Munchen, Federal Republic of Germany. Contact: Rosmarie Vogel, Abteilung fur Klinische Chemie und Klinische, Biochemie in der Chirurgischen Klinik der Universitat Munchen, Nassbaum.stra.siie 20, D-8000 Munchen 2, Federal Republic of Germany Modeling and Simulation Conference. April 30. Pittsburgh, Pa. Sponsored by t h e University of Pittsburgh School of Engineering, the Pittsburgh Section of ISA, and other societies. Emphasis will be on microprocessors and their applications. Contact: Mr. W. Vogt, 348 Benedum Hall, University of Pittsburgh, Pittsburgh, Pa. 15261 26th International Instrumentation Symposium. May 5-8. Red Lion Inn/Seatac Hotel, Seattle, Wash. Contact: A. E. Bowman, HyCal Engineering, 12105 Los Nietos Rd., Santa Fe Springs, Calif. 90670.213-698-7785 Symposium on the N e u r o c h e m i cal and Clinical Applications of Liquid Chromatography w i t h Electrochemical Detection (LCEC). May 15-16. Lafayette, Ind. Contact: LCEC Symposium, c/o BAS, Purdue Research Park, West Lafayette, Ind. 47906. 317463-2505. December, page 2498 A I 4th Symposium on Ion E x c h a n g e . May 27-30. Balaton Lake, Hungary. Contact: J. Inczedy, Organizing Committee, 4th Symposium on Ion Exchange, P.O.B. 28, Veszprem, Hungary H-8201 I 10th Annual Symposium on the Analytical Chemistry of P o l l u tants. May 28-30. Dortmund, Federal Republic of Germany. Contact:

CIRCLE 232 ON READER SERVICE CARD 5 2 A · ANALYTICAL CHEMISTRY, VOL. 5 2 , NO. 1, JANUARY 1980

J. Wendenburg, Gessellschaft Deutscher Chemiker, P.O. Box 90 04 40, D-6000 Frankfurt am Main 90, FRG. June, page 730 A Application of Appropriate T e c h n o l o g y to Chemical Dose and Chemical Residue Monitoring. May 28-30. Washington, D.C. Contact: J. P. Keeve, U.S. EPA (RD-683), 401 M St. S.W., Washington, D.C. August, page 976 A ACS Great Lakes Regional Meeting. J u n e 4-6. Macomb, 111. Contact: J. Bundschuh, Dept. of Chemistry, Western Illinois University, Macomb, III. 61455 33rd Annual Summer Symposium on Analytical Chemistry— Correlation T e c h n i q u e s and Optimization Methods in Analysis. J u n e 5-7. Duke University. Contact: C. H. Lochmuller, Local Arrangements Chairman, Paul M. Gross Chemical Laboratory, Dept. of Chemistry, Duke University, Durham, N.C. 27706. 919-684-2414 63rd Chemical Conference. J u n e 8-11. Ottawa, Ontario. Sponsored by T h e Chemical Institute of Canada. Contact: Dr. George Kelt, Division of Chemistry, National Research Council, Ottawa, Ont., Canada K1A OR9. 613-993-2520 3rd International Symposium on Quantitative Mass Spectrometry in Life Sciences. J u n e 10-13. Rijksuniversiteit Ghent, Belgium. Contact: Prof. A. De Leenheer, Symposium Chairman, Laboratoria voor Medische Biochemie en voor Klinische Analyse, De Pintelaan 135, B-9000 Ghent, Belgium ACS Joint N o r t h w e s t - R o c k y Mountain Regional Meeting. J u n e 12-14. Salt Lake City. Contact: E. Eyring, Dept. of Chemistry, University of Utah, Salt Lake City, Utah 84112 Symposium on the Legal Implications of Environmental ASTM Standards for Forensic P u r poses. J u n e 13-14. Milwaukee, Wis. Contact: Dr. Alan P. Bentz, U.S. Coast Guard Research and Development Center, Avery Point, Groton, Conn. 07340 November, page 1341 A 7th International Symposium on Mass Spectrometry in B i o c h e m istry, Medicine and Environmental Research. J u n e 16-18. Milan, Italy. Contact: Alberto Frigerio, Istituto di Ricerche Farmacologiche Mario Negri, Via Eritrea, 62—20157 Milan, Italy November, page 1341 A I Symposium on N e w Analytical Techniques for T r a c e Constituents of Metallic and Metal-