NEW
No thermometer. No interpolation. No human error. Simple, fast, accurate. The AO Abbe Digital Refractometer automatically displays refractive index to four decimal places. No correction tables or scales are needed. Add the sample, set the contrast line, push a button and instantly read refractive index (or brix) measurements from a large LED display with accuracy of ±0.0001 for refractive index and ±0.1 for brix. Press another button and temperature of the sample is immediately displayed. For further details write American Optical, Scientific Instrument Division, Buffalo, NY 14215, or contact your AO dealer for a demonstration.
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TOXIC SUBSTANCES CONTROL D Toxic Substances Control Act Implementation of the Toxic Substances Control Act poses many problems and offers some opportunities. The role of Government, industry and universities is discussed. 5 Speakers
D Methods for Risk Assessment Risks and hazards posed to society by chemicals, radiation, and other toxic materials are discussed by scientists and Government spokesmen. S Speakers Π Monitoring Toxic Substances Dr. Bruce Ames and scientists from ERDA and MIT discuss hazards and detection of carcinogens, mutagens, and other toxic substances found in industrial environments. 4 Speakers
Ο Biological Effects of Pollutants Experts examine the effects of environmental pollutants on health. Long-term/low-level studies, and controlled studies in humans are discussed. S Speakers Π Chemical Carcinogens An in-depth look at the problem of hazardous substances in the environment. Experts from N.I.O.S.H., EPA, and the National Cancer Institute discuss the what, why, how, and management of this growing national problem. 5 Speakers
Prices: $19.95 per title (Postpaid) cassettes only price includes printed copies of slides used SPECIAL—$49.95 Any T h r e e Titles (Postpaid) (California residents add 6% state use tax.) ORDER FROM: American Chemical Society 1155 Sixteenth Street, N.W. Washington, D.C. 20036 Dept. AP
AOAbbe Refractometer CIRCLE 5 O N READER SERVICE CARD
678 A · ANALYTICAL CHEMISTRY, VOL. 5 1 , NO. 7, JUNE 1979
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