from the prime source
HEAVY OXYGEN PRODUCTS What is in a label? If that label bears the signature "Research Products Division, Miles Laboratories, Inc." the product is from the basic manufacturer, Miles-Yeda Ltd. and you have complete assurance of product integrity and service. Miles-Yeda Ltd. of the Research Products Division is a basic producer of Oxygen-17 and Oxygen-18 products. More than 62 different isotopic oxygen products, in a broad range of enrichments, are available for research. Whatever your needs, consult MILES for these unique stable isotopes. For a complete listing of isotopes, both stable and radiolabeled, write for our new catalog D.
RESEARCH
MILES
PRODUCTS
RESEARCH DIVISION MILES LABORATORIES, INC. P.O. Box 272 Kankakee, Illinois 60901 U.S.A. IN EASTERN HEMISPHERE: MILES SERAVAC PTY. LTD. HOLYPORT, BERKSHIRE, ENGLAND IN ISRAEL: MILES YEDA LTD. REHOVOT, ISRAEL
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THE WORLD'S NMR & EPR SUPPLY HEADQUARTERS ONE-STOP SOURCE FOR THE BEST NMR MATERIALS AND SUPPLIES AVAILABLE ANYWHERE For more than 18 years, we have pioneered in the development and manufacture of the world's finest NMR precision sample tubes. During those years we have added such items as large volume sample tubes, tube holders, pipets, sample filters, coaxial cells, microcells, special NMR thermometers, reference capillaries, and storage vials. But that's not all . . . we have just expanded our line again! Now you can order NMR chemicals, chart paper, chart paper binders, and recorder ink from Wilmad. Write today for our complete NMR Catalog. Address your letters to Wilmad Glass Company, Inc., Route 40 and Oak Road, Buena, N. J. 08310, U.S.A.
WILMAD PIONEER IN GLASSWARE FOR NMR SPECTROSCOPY
CIRCLE 124 ON READER SERVICE CARD 88 A
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ANALYTICAL CHEMISTRY, VOL. 4 3 , NO. 6, MAY 1 9 7 1
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