INSTRUMENTATION SPECIALTIES CO., INC

GRAD Programmed Gradient. Pump will form almost anytwo component concentration, pH, or other gradient by simply setting a series of dials. A completel...
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DIAL A GRADIEIMT

A CORCO MANUFACTURERS' LITERATURE:

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Heating Equipment. A 12-page cata­ log describes and illustrates the latest laboratory heating equipment and con­ trols by Electrothermal Engineering Ltd., London, England. Electro-ther­ mal Sales Corp., 14 Landing Rd., Roslyn, Ν . Ύ. 11576 601

FOR

CHROMATOGRAPHIC ELUTION OR FILLING Z O N A L ROTORS.

The ISCO Model 190 DIALAGRAD P r o g r a m m e d G r a d i e n t Pump will form almost any two component concentration, p H , o r other gradient by simply setting a series of dials. A completely mixed, essentially non-pulsating flow at a uniform rate is produced with no cams to cut or multiple solutions to mix at estimated con­ centrations. The shape of the curve is determined by setting eleven 0 to 1 0 0 % dials which rep­ resent the initial, final, and nine evenly spaced intermediate ratios. This gives 10 program in­ tervals, each of which are auto­ matically subdivided into five linear interpolations to produce a smooth gradient. Calibrated flow rates from 0.5 to 500 milliliters per hour and p r o g r a m d u r a t i o n s f r o m 10 minutes to 12 days are set with positive stop switches. The DIALAGRAD w i l l p r o d u c e l i n e a r or curved gradients with equal ac­ curacy and the program will be perfectly reproducible run after run. The instrument takes but a few seconds to program and re­ quires no attention during a program run. For more information, ask for brochure D P 3 I .

INSTRUMENTATION S P E C I A L T I E S CO., I N C . 4 7 0 0 SUPERIOR

LINCOLN, NEBRASKA 6 6 5 0 4

Gas Chromatography Systems. The 1600 series gas chromatograph, system modules, and accessories are described in a 24-page catalog. H C L Scientific, Inc., 1800 Broadway, P . O. Box 4223, Rockford, 111. 61110 602

SAFER MORE per BOTTLE SAVES FREIGHT

Smoke inspection Guide. Model 110, consisting of a specially developed strip of photographic film with four mea­ surement sections and a protective case, is described in Bulletin 804, two pages. Environmental Research Corp., 3760 N. Dunlap St., St. Paul, Minn. 55112 603

CORCO REAGENT HCI

Temperature Controller. Bulletin 1240/DB 4.5, two pages, presents Model 72C, a compact, nonindicating, temperature controller with a time pro­ portioning mode of control. BarberColman Co., Rockford, 111. 61101 604

in NEW

PLASTIC BOTTLE • Safer—no breakage.

Germanium Detectors. Specifications of lithium drifted germanium detectors, dewar-detector configurations, and op­ tions are presented in a six-page bro­ chure. Isotopes, Laboratory Products Division, 50 Van Buren Ave., Westwood, N . J. 07675 605

• Holds 8 pints of acid. • Less freight—20% less shipping weight for same weight of acid. • Easier and safer disposal

Pulse Height Converter. Design and operational features of Model 461A are described in Bulletin 58A, 12 pages. Technical Instruments, Inc., 441 Wash­ ington Ave., North Haven, Conn. 06473 606 Laser-Raman Spectrometry. A 16page catalog includes descriptions of laser options, sample illuminator with holders for gaseous, liquid, and solid samples, double spectrometer, detec­ tion, amplification, and recording equipment and accessories for the R a m alog, a laser-Raman spectrometry sys­ tem. Spex Industries, Inc., 3880 Park Ave., Metuchen, N . J. 08840 607

of empties, Corco reagent grade ammo­ nium hydroxide is also avail­ able in plastic 1-galIon bottles.

CORCO CHEMICAL CORPORATION Manufacturers of Reagent and Electronic Chemicals

Tyburn Road & Cedar Lane, Fairless Hills, Pa. 19030 'Phone: (215) 295-5006 Circle No. 160 on Readers' Service Card

Circle No. 153 on Readers' Service Card See ACS Laboratory Guide for AH Products/Sales Office

GALLON

VOL.

40, NO. 14, DECEMBER 1968 ·

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