FISHER SCIENTIFIC CO

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MANUFACTURERS' LITERATURE Chemist-Analyst, Vol. 55, No. 2. This issue contains articles on several photometric determinations (cobalt, molybdenum, and iron), a review of oscillographic a.c. polarography and its application to organic compounds, and other articles. J. T. Baker Chemical Co., Phillipsburg, N. J.

See how precisely you can read this expanded pH scale. To ±0.002pH unit

Gas-Chrom Newsletter, Vol. 7, No. 2. This issue reports on new silicone stationary phases, polysulfone as a stationary phase for gas chromatography, and the technique for silanc treating supports. Applied Science Laboratories, Inc., State College, Pa. 16801 Jena Review, No. 1/1966. This issue contains articles on such subjects as photometric analysis of lignite ash, spectrophotometric measurements of colored borax glass, and the analysis of silicates. VEB Carl Zeiss JENA, Literary Dept., Jena (Saale), Carl-Zeiss-Str. 1, Jena, Germany Atomlight, No. 53, April 1966. This issue contains a paper by M. Pascaud, "Radiochromatography of Cholesterol" presented at the Tenth Symposium on Advances in Tracer Methodology. New England Nuclear Corp., 575 Albany St., Boston,. Mass. 02118 Spectrovision, No. 15, 1966. This issue contains a feature article on the SP90 atomic absorption spectrophotometer. Unieam Instruments Ltd., Cambridge, England GC Newsletter, Vol. 2, No. 3. The performance of Models 880 and 881 gas chromatographs is described in detail. Perkin-Elmer Corp., Main Ave., Norwalk, Conn. Infrared Sampler, Vol. 4, No. 2. Attenuated total réflectance techniques in plastics analysis arc discussed. Barnes Engineering Co., Stamford, Conn. Application Notes, May 1966. This issue features waveform generators which may be set up with operational amplifiers and accessories. McKeePedersen Instruments, Box 322, Danville, Calif. 94526 Electro-Optics Newsletter, April 1966. A section listing the physical and crystallographic properties of lithium niobato is included. The Harshaw Chemical Co., 1945 E. 97th St., Cleveland, Ohio 44106 Previews & Reviews, No. 5, 1966. This issue features the Hy-Fi-III Model 1200 gas chromatograph. Varinn Aerograph, 2700 Mitchell Dr., Walnut, Creek, Calif.

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h actual size

It's on Fisher's new Ace umet 310 ρΗ Meter.

When you measure pH, you need an instrument that can measure accu­ rately to however many places you require. You also need a scale that shows the value as precisely as it's measured. You have both in Fisher's new Accumet 310 pH Meter. Its expanded mode stretches 1.4 pH or 140 mv over 7 inches, giving readings accurate to ±0.005 pH or ±0.5 mv. The 1.4-pH ranges begin at any integral value, overlap so most read­ ings can be made to ±0.002 pH or ±0.2 mv near midscale. As you see, the Accumet 310 has the usual 0-14 pH, 0 to ±1400 mv scale (±0.05-pH or ±5-mv accuracy), and a logarithmic scale showing relative ion con­ centrations. You'll use the Accumet 310 for both routine measurements and research, and for electrometric titrations (including Karl Fischer). Scales are mirror-backed to eliminate parallax; response is fast, circuits drift-free; use of recorders is easy; accessory adapts for microsamples. And the unique Accumet test circuit shows whether errors are external or internal when readings are questioned. All for just $595, with guaran­ teed Fisher electrodes. For our product bulletin, write Fisher Scientific Company, 100 Fisher Building, Pittsburgh, Pa. 15219. j.563

FISHER SCIENTIFIC C O . Instruments, Apparatus, Furniture and Chemicals for Laboratories Complete stocks in all these locations: Atlanta · Boston · Chicago · Cleveland · Houston · New YorK Philadelphia · Pittsburgh · St. Louis · Union, N. J. · Washington · Edmonton · Montreal · Toronto · Vancouver "See Laboratory Guide for all Products/Sales Offices" Circle No. 38 an Readers' Service Card

VOL. 38, NO. 8, JULY 1966 ·

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