Product Capsules BURRELL
Chemicals, Reagent. Circle 54A for company's chemical index. 370 pages listing 7,344 chemicals. Contains in formation on hydrogen peroxide in spun aluminum containers. Fisher Scientific Co., 100 Fisher Bldg., Pitts burgh 19, Pa.
THE
Fluorine, Liquid. Fluorine is now being stored, transported and handled directly as a liquid in tank-truck tonnages. Available is comprehensive new technical ' bulletin, "Fluorine." I t contains a wealth of helpful data and outlines new approaches. General Chemical Div., Allied Chemical & Dye Corp., 40 Rector St., N. Y. 6, Ν. Υ. 4th cover
KROMO-TOG
Spectrographic Standards. Full specifications and prices available on Johnson, Matthey & Co., Ltd. high purity materials for chemical, spectro graphic, x-ray research and analysis. Jarrell-Ash Co., 32 Farwell St., Newtonville 60, Mass.
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Gas and Vapor Phase Chromatography At Its Best!
SPEEDY Cuts analysis time to minutes even for complex compounds. FLEXIBLE Designed for ease of operation in research or process control.
Burrell Kromo-Togs are complete and versatile instruments for the quick and accurate analysis by elution of most gases and volatilized liquids. Model K-2 (pictured) accommodates two separate columns for maximum flexibility and operating economy in plant or laboratory. Features include the finest detector cell avail able, variable column temperature control and other exclusive developments of Burrell labora tories. © Trademark BURRELL KROMO-TOG, MODEL K-2 Cat. No. 340-20 $3,600.00 Other Models from $695. up
Register your name for BURRELL bulletins on modern
chromatography
BURRELL CORPORATION Scientific Instruments and Laboratory Supplies 2 2 2 3 Fifth A v e n u e , P i t t s b u r g h I S , P e n n s y l v a n i a For further information, circle number 75 A-1 on Readers' Service Card, page 77 A
Let's c o m p a r e results on A l p h a - B e t a c o u n t i n g !
Polarographic Literature. Informa tion available on the "Bibliography of Polarographic Literature—1922-1955" compiled and published by Ε. Η. Sargent & Co. 192 pages. Over 6,800 listings. 48 page subject index con taining over 14,000 references. Ε. Η. Sargent & Co., 4047 W. Foster Ave., Chicago 30, 111. 72A-2 Radioactive Chemicals. Circle 85A-2 for copy of Tracerlab's "Chemical Catalog 2nd Edition." Contains in formation on many new radioactive chemicals. Tracerlab, Inc., 1601 Trapelo Rd., Waltham, Mass. 85A-2
Everywhere"
Model K-2
Filter Papers. Circle 21A-1 for filter paper sampler made up of several grades. Circle 21A-2 for catalog on ultra filters: smooth-surface membranes possessing extremely uniform micro-structure. Carl Schleicher & Schuell Co., Keene, N. H. 21A-1,2 Filter Papers. Circle 22A for samples of company's filter paper for experi ments in chromatography, electro phoresis, and qualitative analysis. Filter papers are available in sheets, rolls, circles, or in special sizes and shapes. The Eaton-Dikeman Co., Filtertown, Mt. Holly Springs, Pa. 22A
" F o r Scientists
Proportional Counter Converter, Model PCC-H (Converts any Scaler}
Complete Proportional Counting System Model PC-3
If you precision count α and/or β activities, using any system other than the NMC proportional counting system . . . S e n d us y o u r s a m p l e ! We'll return it with the exact radioactivity rates precision re c o r d e d by N M C p r o p o r t i o n a l FREE NMC CATALOG counting equipment, Covers NMC's complete line of nuclear nuclear instruments. instruments. Or, if you prefer, send for a free of Write today for your copy. calibrated source.
NMC
Nuclear Measurements Corp. 2 4 6 0 N. Arlington Ave.
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Telephone: LIBERTY 6-2415
I N D I A N A P O L I S 18, I N D I A N A International Office: T3 Ε. 40th St., N e w York Ι ο , Ν.Υ. For farther information, circle number 75 A-2 on Readers' Service Card, page 77 A V O L . 2 9 , N O . 4, APRIL 1 9 5 7
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