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Acetyl thiourea · Benzohydroxamic acid · Biuret · tert-Butyl chloride Cesium chloride · Dibenzoylmethane · Diethyl adipate · Dipropyl ketone

2,2'-Dipyridyl · Disodium phenyl phosphate · Glutaric acid & anhydride 2,5-Hexanediol · Imidazole · Iminodiacetic acid, disodium salt

Malonic acid · Melibiose · Methyl-2-furoate · Methyl tert-butyl ether Nltroso R salt · Orcinol · Phenyl thiourea · Phenyiurea · Pimelic acid

Sarcosine · Sodium malonate · Sodium succinate · Sodium tetraphenyiboron Taurine · Triphenyl phosphine · o-Vanillin · Veratraldehyde · Xanthone

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Laboratory Service Center (Equipment, Materials, Services, Instruments for Leasing), Maximum space — 4 inches per advertisement. Column width, 2-3/16"; two-column width, 4-9/16". Artwork accepted. No combination of directory rates with ROP advertising. Rates based on number of inches used within 12 months from first date of first insertion. Per inch: 1 " — $107; 12" — $105; 24" — $ 1 0 1 ; 36" — $98; 48" — $96.

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INDEX TO ADVERTISERS IN THIS ISSUE

792 A · ANALYTICAL CHEMISTRY, VOL. 55, NO. 7, JUNE 1983

CIRCLE INQUIRY NO. ADVERTISERS PAGE NO. 3 *Alltech Associates 718A

Chromad 5 *Antek Instruments 719A 21 *B&L: Spectroscopy 787A

Blair Advertising 14 'Beckman Instruments 731A

LaPointe, Schott & Smith, Inc. 25 Beckman Instruments—Irvine 729A

Cochrane Chase Livingston & Co. 29 Bel-Art Products 734A

D&S Marketing Associates 30-31 'Bloanalytical Systems 768A, 774A

Kissinger Advertising Associates 27 *Bio-Rad Labs 715A

LaPointe, Schott & Smith, Inc. 8-11 *Blue M Electric 710A

South Suburban Advertising 23 'Brlnkmann Instrument OBC

Lavey/Wolff/Swift 18 'Bruker Instruments 789A

Techmarketlng 17 * Bur dick & Jackson 773A

Nordstrom/Cox Marketing 33 Cahn Instruments 720A

Mealer & Emerson 32 "Cajon Company 737A

Falls Advertising 34 Camag 724A

Werbeagentur CBS 35 Chrompack 738A

Lohmeyer Simpson 32 'Crawford Fitting Company 737A

Falls Advertising

CIRCLE INQUIRY NO. ADVERTISERS PAGE NO.

60 'Dlonex Corporation 701A Baxter, Gurian & Mazzei, Inc.

62 Duralab Equipment Co 791A Michael W. Schoen Co.

64 EG & G Ortec 695A 63 ESA 704A

J. Balderson & Associates 66-68 «Fisher Scientific Co.

702A-703A, 725A, 754A-755A 65 'Florldln Company 740A

Marsteller, Inc. 69 'Forma SclentHIc 791A

Fahlgren & Ferriss 101 Galileo Electro-Optics Corp 736A

Edward Heske Associates 95 Gelman Sciences, Inc 768A

Tl Group Ltd. 98 General Motors 705A-707A

N.W. Ayer Inc. 99 *GFS Chemicals 720A 100 'Gilford Instruments 743A

Oberlin Industrial Advertising 102-103 'Gllson Medical Electronics 688A-689A

LaPointe Schott & Smith, Inc. 104 Haake-Buchler 767A

Art Service/Technical Promotions 106 Hach Company 748A

Art Service/Technical Promotions 108-109 'Hewlett-Packard Co 685A

Plnne, Garvin & Hock 110 Houston Instrument Dlv. of Bausch & Lomb . . . . IFC

Cooley & Shillinglaw