VOLUME
27A
2 2 , N O . 1, J A N U A R Y 1 9 5 0
INDUSTRIAL LITERATURE Photometers. Descriptive circulars 810 and 812 give infor mation on photometers for photomicrography and metallog raphy. Photovolt Corp. . . .1
«Κ
• . . for rapid, accurate preparation of Volumetric Solutions· . . Laboratories requiring speed and accuracy are using Acculute with excellent results.
Heating Jackets. 12-page brochure on Gyco heating jackets made of Fiberglas and heating element wire. The new type jackets with safety thermostats are described. Scientific Glass Appara tus Co. ... 2 Radiation Counter Tubes. Illustrated bulletin gives details on line of self-quenching radiation counter tubes. Amperex Electronic Corp. ... 3 Films and Plates. Special sensitized plates and films for scientific and industrial laboratories are described in a new 8-page booklet. Information is given on emulsions available for spectrographic work, photomicrography, a n d nuclear track studies. Eastman Kodak Co. ...4 Combustibles Recorder. Design improvements and new applications are explained in 16-page bulletin (No. 150-A). Drawings and photographs explain the operation of this elec tronic type instrument which operates on the catalytic combus tion principle. Bailey Meter Co. ...5
ACCULUTE SAVES TIME —Open the ampoule —transfer the con tents to a volumetric flask —dilute to volume (1000 ml),—your volumetric solution is prepared. ACCULUTE IS RELIABLE-Close control of the special manufac turing processes insures uniformity of the product. Acculute does not vary in chemical content —you can depend on it. ACCULUTE IS ACCURATE —Each ampoule contains the precise concentrated equivalent of the normality stated on the label. There is no need for subsequent standardization. Caustic solutions are supplied in wax ampoules, others in chemically resistant glass. Complete instructions for preparing Acculute solutions are furnished with each unit. A special bulletin, listing Acculute concentrates with prices and discounts will be sent on request.
Polarography. 12-page brochure discusses the general prin ciples of the polarograph and its uses. Tinsley (Industrial Instruments) Ltd. ...6
Nitrogen Determinations.
The new Hengar [Kjeldahl
apparatus and technique are fully described in a 16-page illus trated booklet. Hengar Co. ... 7 Electro-Optical Instruments. First issue of quarterly pub lication devoted to descriptions and use of such instruments as infrared spectrometer, flame photometer, Tiselius electrophoresis apparatus, etc. Perkin-Elmer Corp. ...8 Thermometers. D a t a on liquid-in-glass industrial thermom eters are presented in an easy to use tabular and sectionalized form in Bulletin E . All basic models, sizes, forms, and attach ments are illustrated. Precision Thermometer and Instrument Co. ... 9
Photoelectric Colorimeter.
Illustrated bulletin B-214
describes new type of Coleman filter colorimeter. The new instrument is of essentially the same construction as t h e Coleman junior spectrophotometer, accepts the same power supplies and a wide range of cuvettes. However, instead of utilizing a monochromator and associated wave-length scale this colorimeter secures spectral isolation by filters. E . Machlett & Son. . . . 70
£immL· u P
TEST PAPERS
Simple Rapid Accurate Accutint is simple to use—just place a strip of the paper in contact with the substance to be tested and compare the color of the exposed portion with the master colors on the vial. Accutint is rapid —it gives immediate results—no calculations are necessary — visual color comparison indicates the pH value. Accutint is accurate —to 1 pH in the wide range paper and to 0.3 pH in the fractional range. Wide range papers are recommended where the p H value is not known to be within the limits of a frac tional range paper. Fractional range papers are used for greater ac curacy after the range has been determined. S-65277 ACCUTINT TEST PAPERS. Packed in glass vials, each vial contains five pads or 100 strips. Color chart and instructions are in cluded with each vial. Per Vial $0.65
Circle desired items and mail to ANALYTICAL CHEMISTRY, 332 West 42nd Street, New York 18, Ν. Υ. New Products 1 2 3 4 5 6 7 8 9 10 Industrial Literature 1 2 3 4 5 6 7 8 9 10 Name
Per 72 Vials
Position
Company
SARGENT
Street City
1 0 % Discount
S-65278 MASTER COLOR CHART. Illustrates colorstandards and read ings for every p H value in each of the twenty-three wide and frac tional ranges. Chart helps in the selection of the most suitable ranges or papers for a specific purpose. Each $3.25
Zone (Please print or type)
State Jan · 5 0
SCIENTIFIC LABORATORY INSTRUMENTS · APPARATUS · CHEMICALS E. H. SARGENT & COMPANY, 4647 W. FOSTER AVE., CHICAGO 30, ILLINOIS M I C H I G A N D I V I S I O N , 1 9 5 9 EAST JEFFERSON STREET, DETROIT 7, M I C H I G A N S O U T H W E S T E R N D I V I S I O N , 5 9 t 5 PEELER STREET, D A L I A S 9 , T E X A S
