MATHESON COLEMAN & BELL

for an industrial and military high-speed photo- graphic taking laboratory. Worklon, Inc. 253 West 28th St. New York 1, N. Y.. Manufactures acid-resis...
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24, Md.; New York 12, Ν. Υ., stocking all leading makes of equipment, instruments, supplies, chemicals used in laboratories of all types. Instrument repairs. Glass shop. Technical service in instrumentation prob­ lems.

KONTES OFFERS . . . Y o u r B e s t G a u g e o f Quality

Wollensak Optical Co. 8 5 0 Hudson A v e . Rochester, Ν . Υ .

Manufacturer of high-speed motion pic­ ture cameras and lenses. The Fastax sys­ tem includes all equipment necessary for an industrial and military high-speed photo­ graphic taking laboratory. Worklon, Inc. 2 5 3 West 28th St. N e w York 1 , Ν . Υ .

Manufactures acid-resistant shirts, pants, coveralls, men's and women's lab coats, industrial apparel, and service uniforms for­ ever ν need, every industry, of Orion and Dynel. Yonkers Laboratory Supply Co., Inc. 7 0 Palisade A v e . Yonkers, Ν . Υ .

Dealer-manufacturer—carries laboratory e q u i p m e n t , glassware, chemicals. H a s own glassblowing d e p a r t m e n t for m a n u f a c t u r e , repair of glassware, according t o specifica­ tions. Q u o t a t i o n s upon request. NEW UPPINCOTT-McLEOD

Carl Zeiss, Inc. 4 8 5 Fifth A v e . N e w York 17, Ν . Υ .

I m p o r t s from West G e r m a n y Carl Zeiss research, l a b o r a t o r y , polarizing, a n d stereo microscopes, micro movie e q u i p m e n t , r e ­ fract omet ers, technoscopes. polarimeters, hand spectroscopes, spectrophotometers, phase-contrast u n i t s , etc.

NEW BENNERT TYPE MANOMETER

GAUGE

In addition to t h e unique mercury self-leveling device which allows Automatic Zeroing {U.S. P a t . No. 2,608,090), t h e new Lippincott-McLeod Gauge has Automatic Stops which assure precise alignment and reproduction oi t h e reading and evacuating positions. Vacuum readings are made instantly. Other features include a built-in trap, precision cap­ illaries, interchangeable scales, cast aluminum base and integral mounting spring. Ranges: Size A, 0 - 1 m m ; B, 0-5 mm ; C, 0-10 m m ; D, 0-15 mm. Ea. $ 3 7 . 5 0

The wide range, low price and ruggedness of t h e new Kontes Bennert Manometer make it an ideal gauge for routine vacuum measurements including vacuum distillation and drying operations. A move­ able scale actuated by a rack and pinion assembly enables precise " O " adjustment. Range, 240 mm., subdivisions, 1 m m . T h e alu­ minum base is finished in modern blue gray hammertone and provided with a carrying handle. Complete as described, with mercury. Ea. $ 2 7 . 5 0

Write /or free Bulletin No. VE-S irhich describes Vacuum Gauges, Diffusion

Pumvs

and oilier vacuum

glassware.

KONTES GLASS COMPANY · V i n e l a n d , N.J Advertisers a p p e a r i n g in " L a b ­ oratory Supply C e n t e r " section of A N A L Y T I C A L CHEMISTRY, M a y 1 9 5 5 through ApcH 1 9 5 6

For further information, circle numbers 61 A-1, 61 A-2 on Readers' Service Card, page 63 A

ALL

Analytical Measurements, Inc. 5 8 5 M a i n St., C h a t h a m , N . J. A r a p a h o e Chemicals, Inc. 2 8 0 0 Pearl St., Boulder, Colo.

THE CHEMICALS NORMALLY USED IN THE LABORATORY

Black Light Corporation of America 5 1 1 4 Walnut Grove A v e . , San Gabriel, Calif. Clark Microanalytical Laboratory P.O. Box 17, Urbana, I I I . Dimco-Gray Co. 2 0 7 East Sixth St., Dayton 2 , Ohio Ealing Corp. Box 9 0 , Natick, Mass. G o w - M a c Instrument Co. 100 Kings Rd., M a d i s o n , N . J.

OVER 4 0 0 0

Johns-Manville Corp. 2 2 East 40th St., N e w York 16, Ν . Υ. David N . Kendall 1 0 3 0 Sherman A v e . , Plainfield, N . J . Kopp Laboratory Supplies, Inc. 1 6 8 0 Second A v e . , N e w York 2 8 , Ν . Υ . LaMotte Chemical Products Co. Towson 4 , M d . Nuclear Instrument and Chemical Corp. 2 2 9 West Erie St., Chicago 1 0 , I I I . Quartz Products Corp. 6 8 8 Somerset St., Plainfield, N . J . Research Chemicals Co. 2 8 1 2 N o . San Fernando Blvd., Burbank, Calif.

N O . 4,

FROM A SINGLE SOURCE

Complete stocks of MC&B items are carried at our East Rutherford and Norwood plants and a r e available either through your laboratory supply dealer or from the East Rutherford or Norwood offices.

OUR 4000 ICAL YOU

N E W BVi" X 1 1 " CATALOG, LISTING MORE THAN REAGENT CHEMICALS, BIOLOGICAL STAINS, CHEM­ INDICATORS A N D SOLUTIONS WILL BE SENT T O U P O N REQUEST.

MATHESON

COLEMAN & BELL

DIVISION O f THE MATHESON COMPANY, INC. Manufacturing

Research Specialties C o . 1 1 4 8 Walnut St., Berkeley, Calif.

VOLUME28,

INORGANIC REAGENTS FINE ORGANICS STAINS AND SOLUTIONS

Matheson, Coleman & Bell Reagent Chemicals include practically all of the items used in research and ana­ lytical work. The Reagent Inorganic Chemicals carry upon the label a statement showing the maximum limits of impurities allowed. The Reagent Organic Chemicals a r e manufactured to pass the specifications shown in our price list. In addition to A.C.S. Inorganic and Reagent Organic Chemicals w e offer many items of U.S.P., N.F., Practical and Technical quality.

Chemists

CAST RUTHERFORD, N I W JIRSIY · NORWOOD (CINCINNATI), OHIO For further information, circle number 61 A-3 on Readers' Service Card, page 63 A

APRIL1956

61 A