Don't inventory all those grades of a solvenl when ONE from B&J will do the job... better • Fewer bottles mean greater safety — fewer hazards. • Fewer bottles mean less storage space — more lab space. • Fewer bottles mean lower inventory costs. You get the best when you order high purity solvents from Burdick & Jackson Labora tories, Inc. All solvents are available in either gallons or quarts. Send for BJ-25.
BURDICK & JACKSON LABORATORIES, INC. MUSKEGON. MICHIGAN 49442
(616)726-3171
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You'll miss plenty if you don't see our new thermal analysis equipment at the Pittsburgh Conference. From the leader: DSC-2 Differential Scanning Calorimeter • TGS-2 Thermogravimetric Analyzer • TMS-2 Thermomechanical Analyzer • M o d e l 240
Automatic Elemental Analyzer • and a new micro processor-controlled temperature programmer. If you can't come—write! Perkin-Elmer Corp., M.S.12, M a i n Avenue, Norwalk, CT 06856. O r Telephone: (203)762-6915.
PERKIN ELMER Expanding the w o r l d of analytical c h e m i s t r y . CIRCLE 215 O N READER SERVICE CARD
264 A · ANALYTICAL CHEMISTRY, VOL. 50, NO. 2, FEBRUARY 1978