Product Capsules
progress in polarography -ft Speedy, direct or derivative operation. •J( Direct reading from scale eliminates geometrical con struction. ^?f Greater resolution due to formation of Peaked Polarograms. ^f P o l a r o g r a m s r e p r o d u c e d every seven seconds. •j( Increased sensitivity enables accurate determinations at concentrations of fractions of a microgram per millilitre.
with the cathode ray POLAROTRACE* you have t h e ultimate in Polarographic technique, without undue complexity of control. Suitable for research or routine, it is supplied complete with its Electrode Stand which includes a thermostaticallycontrolled tank, provision for simultaneous degassing of the three cells and easy means of raising and lowering t h e electrode in t h e solu tions under test. Camera attach ments are also available.
funnels for spectrographs, chemical bromination, or vacuum fusion determinations. United Carbon Products Co., Inc., P. O. Box 269, Bay City, Mich. 18A Graphite. "National" powdered graphite and rods are accompanied by a "statement of purity" stating the traceelements present. National Carbon Co., Div. of Union Carbide Corp., 30 East 42nd St., N. Y. 17, Ν. Υ. 49Α Nitric Acid. Company announces the availability of reagent nitric acid in dis posable bottles and cases (six 5-pint bottles per case). Bottle features dripless pouring sleeve, color-matched la bels and closures. J. T. Baker Chem ical Co., Phillipsburg, N. J. 2nd Cover Oil Distillates. Bulletin available on Apiezon oil distillates for high vacuum work. Their vapor pressures are as lowas 10 ~6 mm. Hg, and unmeasurable at room temperature. James G. Biddle Co., 1316 Arch St., Philadelphia 7, Pa. 4 2 A-1 Organic Chemicals. Company car ries complete line of Matheson organics. 1500 new items have been added to pre vious stock. Chicago Apparatus Co., 1735 No. Ashland Ave., Chicago 22, 111. 97A-4 Silicate Stone. Company's chemical resistant natural silicate stone can be cut, drilled, tongue-and-grooved, refinished and reused almost indefinitely. Alberene Stone Corp., 419 Fourth Ave., N. Y. 16, Ν. Υ. 56Α Sodium Hydroxide. Company offers two grades of Baker & Adamson reagent sodium hydroxide pellets: Reagent Special "Low Carbonate" with a car bonate limit of 0.5%, and Reagent A. C. S. material with carbonate limit of 2.0%. Both are available in 1-lb. and 5-lb. screw-cap bottles. General Chemical Div., Allied Chemical & Dye Corp., 40 Rector St., N. Y. 6, Ν. Υ. 4th Cover
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MISCELLANEOUS
Book, Solvent Extraction. Informa tion available on "Solvent Extraction in Analytical Chemistry" by George II. Morrison, Ph.D. Illustrated book in cludes coverage of currently used pro cedures; new theories, new techniques, *Trade Mark Write for brochure 101 and advice treats practical aspects. 1957, 269 on your own problem. pages, 6 Χ 91/,,, $6.75. John Wiley & Sons, Inc., 440 Fourth Ave., Ν. Υ., 16, SOUTHERN INSTRUMENTS COMPUTER DIVISION, Ν. Υ. 93Α-2 CAMBERLEY, SURREY, ENGLAND Chemical Exposition. The 26th Ex Cables : Minrak. Camberley. England position of Chemical Industries will be POLAROTRACE -another example oi held in the New York Coliseum, Dec. 2-6, 1957. Over 500 exhibits. Circle 107A-1 for information. International S&Wtce τά? Zefeasiest- etsut âusfaiétf Exposition Co., 480 Lexington Ave., N. Y. 17, Ν. Υ. 107A-1 Circle No. 85 A-1 on Readers' Service Card, page 87 A
The Patterson-Kelley Co., Inc. 2 1 0 Hanson St., E. Stroudsburg, Pa. Q
I w o u l d like to take a d v a n t a g e of your free test-blending offer.
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Patterson-Kelley Circle No. 85 A-2 on Readers' Service Card, page 87 A
VOL. 29, NO. 10, OCTOBER 1957 ·
85 A
