DIAL A GRADIEIMT
A CORCO MANUFACTURERS' LITERATURE:
FIRST
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. Λ
CORC
O
CHEMICAL CORPORATION Manufacturers of Reagent and Electronic Chemicals
Tyburn Road & Cedar Lane, Fairless Hills, Pa. 19030 'Phone: (215) 295-5006
Circle No. 153 on Readers' Service Card See ACS Laboratory Guide for AH Products/Sales Office
GALLON
Circle No. 160 on Readers' Service Card
VOL.
40, NO. 14, DECEMBER 1968 ·
109 A
