V O L U M E 2 4, NO. 1, J A N U A R Y 1 9 5 2
49 A
INDEX TO ADVERTISERS American Platinum Works 38 A Applied Research Laboratories 16 A Baird Associates, Inc 28 A Baker & Adamson Products, General Chemical Division, Allied Chemical & Dye Corp 4th Cover Baker Chemical Co., J. Τ 2nd Cover Bausch & Lomb Optical Co 50 A Beckman Instruments, Inc 5 A Bethlehem Apparatus Co. Inc 39 A Brookfield Engineering Laboratories, Inc 39 Λ Buffalo Apparatus Corp 26 A Burrell Corp 35 A Central Scientific Co Coleman Instruments, Inc Consolidated Engineering Corp Coors Porcelain Co
6 27 9 44
Despatch Oven Co
41 A 29 43 44 19 42 24
General Laboratory Supply Co
22 A 12 A
Harshaw Chemical Co
10 A
New York Laboratory Supply Co. Inc Parr Instrument Co Patent Button Co. Photovolt Corp Sargent & Co., E. II Schaar & Co Schleicher & Schuell Co Scientific Glass Apparatus Co. Inc Southern Scientific Co. Inc Specialized Instrument Corp Standard Scientific Supply Corp Thermo Electric Mfg. Co Thomas Co., Arthur H Torsion Balance Co
. . Laboratories requiring speed a n d accuracy are using Acculute with excellent results.
A A A A A A1
Greiner Co., Emil
Owens-Illinois Glass Company, Kimble Glass Div
• . · for rapid, accurate preparation of Volumetric Solutions*
A A A A
Eastman Kodak Co Eberbach Corp Farrand Optical Co. Inc Federated Purchaser, Inc Fish-Schurman Corp Fisher Scientific Co
Kewaunee Mfg. Co Kimble Glass Div., Owens-Illinois Glass Company Klett Mfg. Co Labelon Tape Co Laboratory Furniture Co. Inc La Pine & Co., Arthur S Leeds & Northrup Co Lindberg Engineering Co Machlett & Son, Ε Mallinckrodt Chemical Works Merck & Co. Inc
ACCULUTE
45 A 11 A 44 A, 46 A 41 A 46 A 36 A 14 A-15 A 42 A 17 A 13 A 8A
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.
47 A 11 A 43 38 A, 39 37 A, 41 A, 46 21 A, 49 18 37 7 26 47 23
A A A A A A A A A A
45 A 20 A 3rd Cover
Voland & Sons Inc
45 A
Welch Scientific Co., W. M Will Corp
30 A 26 A
F
TEST
"r
PAPERSΊΛ Simple
DIRECTORY Laboratory Supply Center Cargille, R. P. Jarrell-Ash Co. Microchemical Specialties Co. Phillips-Drucker Co. Sorvall, Inc., Ivan Southwestern Analytical Chemicals Wisconsin Alumni Research Foundation
DH
48 A
REINHOLD PUBLISHING CORPORATION Advertising Management for the American Chemical Society Publications 330 W. 42nd Street, New York 18, Ν. Υ. ADVERTISING SALES REPRESENTATIVES Merald Lue, Advertising Sales Manager New York 18-BRyant 9-4430; B. Franklyn LaRue, Eastern Adver tising Sales Manager; James J. Sullivan, Thomas F . Casey, Brayton C. Nichols Cleveland 1 3 - 6 3 0 Terminal Tower, PRospect 1-5583; Rodney D. Long Chicago 3 - 1 1 1 West Washington Street, RAndolph 6-8497; G. E. Cochran, Western Advertising Sales Manager; Edward J. Fregan San Francisco 5—McDonald-Thompson, 625 Market Street, YUkon 6-0647; Roy M. McDonald Los Angeles 5—McDonald-Thompson, 3727 West Sixth Street, Dunkirk 7-5391; Ε. Τ. Thompson Seattle 1—McDonald-Thompson, Terminal Sales Bldg., Main 3860; Harry Abney Dallas 11-McDonald-Thompson, 1118 Odeans Drive, Winfield 4911; Richard C. Wipperman
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 pH 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-6S277 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 Per 72 Vials
1 0 % Discount
S-65278 MASTER COLOR CHART. Illustrates color standards and read ings for every p j l 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 $1.00
SARGENT SCIENTIFIC LABORATORY INSTRUMENTS · APPARATUS · CHEMICALS Ε. Η. 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 1 5 PEELER STREET, D A L L A S 9 , T E X A S
