INDEX TO ADVERTISERS Ace Glass, Inc American Agile Corp American Instrument Co American Optical Co American Platinum Works The Analyst Anglo-American Scientific Artia Baird Associates, Inc J. T. Baker Chemical Co Barnstead Still & Sterilizer Co., Inc Bausch and Lomb Optical Co Beckman instruments, inc Bethlehem Apparatus Co., Inc C. A. Brinkmann & Co Buhler Brothers, Inc Burrell Corp
64 14 16 39 18 37 42 78 53 12-13 41 4th Cover ή:23 38 25 73 36
Cambridge Instrument Co., Inc Central Scientific Co Chemical Industries Exposition Coleman Instruments, Inc Consolidated Engineering Cor;) Coors Porcelain Co Corning Glass Works
78 48-49 41 11 56 40 fi : 70
Delmar Scientific Co Despatch Oven Co Detectolab, Inc Harry W. Dietert Co E. I. du Pont De Nemours &. Co Eastman Kodak Co Ebcrbach Corp Fisher Scientific Co Fischer & Porter Co Fish-Schurman Corp
74 78 72 18 17 57 71 2nd Cover 58 40
General Electric Co General Radio Co Ε mil Greiner Co Hanovia Chemical & Mfg. Co Harshaw Scientific Co International Art & Science Book Co International Equipment Co
50:67 59 26 37 8 78 9
Jarrell-Ash Co
45
Kewaunee Mfg. Co
24
Kimble Glass Div., Owens-Illinois Glass Co. 3rd Cover Klett Mfg. Co 43:40 Kontes Glass Co 77 Laboratory Construction Co Laboratory Equipment Corp Laboratory Glass Supply Co Lindberg Engineering Co. (Lab. Div.) Lithium Corp. of America, Inc Loomis Engineering & Mfg. Co
45 71 71 22 10 16
E. Machlett & Son Mallinckrodt Chemical Works Metalab Equipment Corp The Mettler Instrument Corp
24 63 27 14
National Carbon Div., Union Carbide and Carbon Corp 75 New York Laboratory Supply Co., Inc 46 North American Philips Co 34-35 Oronite Chemical Co 54 Owens-Illinois Glass Co., Kimble Glass Div. 3rd Cover Palo Laboratory Supplies, Inc Parr Instrument Co Perkin-Elmer Corp Photovolt Corp Precision Scientific Co Process & Instruments
41 43 28:29 15 32 : 68:69 77
Research Specialties Co Rubber Latex Products, Inc Ε. Η. Sargent & Co August Sauter Schaar & Co Carl Schleicher & Schuell Co Ivan Sorvall, Inc Spinco Div., Beckman Instruments, Inc Superior Electric Co
74 73 7:31 68 44 20-21 38 19 47
Arthur H. Thomas Co 30 :62 Tracerlab, Inc 77 Union Carbide & Carbon Corp., National Carbon Div 75 U. S. Stoneware Co 66 Varian Associates
65
W. M. Welch Scientific Co Wiikens-Anderson Co Will Corp. & Subsidiaries
27:60 4 72
Carl Zeiss, Inc
73
DIRECTORY Laboratory Supply Center
Clark Mieroanalytical Laboratory Johns-Alan ville Corp. David N. Kendall, Ph.D. LaMotte Chemical Products Co. Wisconsin Alumni Research Foundation
76
REINHOLD PUBLISHING CORPORATION Advertising Management for the American Chemical Society Publications, Merald Lue, Advertising Sales Manager, ACS Publications 430 Park Avenue, New York 22, Ν. Υ. SALES REPRESENTATIVES David B. Hoopes Advertising Sales Manager New York 22-MUrrayhill 8-8600; David B. Hoopes; District Managers—Charles Richards Stoddard, Jr.; Thomas N. J. Koerwer Cleveland 14-NBC Bldg., 815 Superior Ave., N.E., PRospect 1-5583; Rodney D. Long, Cleveland Manager, Reinhold Publishing Corp. Chicago 2 - 1 1 1 W. Washington St., RAndolph 6-8497; District Manager—Fritz Lee; District Manager, Southern States (Ala., Ga., Fla., Κy., Miss., Tenn. ) H. Scott Leonard San Francisco 5—McDonald-Thompson, 625 Market St., YUkon 6-0647; Roy M. McDonald Los Angeles 5—McDonald-Thompson, 3727 West Sixth St., Dunkirk 7-5391; Ε. Τ. Thompson Seattle 4—McDonald-Thompson, National Bldg., 1008 Western Ave., ELliott 3767; Harry Abney Houston 6—McDonald-Thompson, 3217 Mont rose Blvd., LYnchburg 6711; Frank N. Vickery Denver 2—McDonald-Thompson, Colorado Na tional Bank Bldg., KEystone 4-4669; Robert H. Heidersbach Dallas 6-McDonald-Thompson, 5526 Dyer St., FOrest 8-5510; Ed J. Whetzel
THE L A B O R A T O R Y SUPPLY CENTE
ACID WASHED FilterAAid
KENDALL INFRARED LABORATORY David N. Kendall, Ph.D., Director Qualitative and Quantitative Analysis on A l l Organics and Most Inorganics Consultation—Research—Personnel Training 1030 Sherman Ave. Plainfidd, N. J. PLainfield 4-5205
CLARK MiCROANALYTIOAL LABORATORY Routine Analyses in one week CH, N , S, Halogen, Fluorine, Oxygen, Alkoxyl, Alkîmide, Acetyl, Terminal Methyl, etc., by specialists in organic microchemical analysis. Howard S. Clark, D/rector P. O . Box 17 Urbane, III.
Celite 521 Celite* 521 is specially processed to remove acid soluble components. Negligible iron content eliminates darkening when filtering tannin compounds. Thus, Celite 521 is par ticularly well adapted to filtration of whiskey. Also highly effective in dilute sul furic acid filtration for peroxide manufac ture, and in production of tannic acid. For samples and complete details about Celite 521, write Johns-Manville, Box 60, New York 16, N. Y. In Canada, 565 ^ s Lakeshore Rd., E., Port Credit, Ont. Ι ί Λ Ί
kW
i"uMN|M f
QUANTITATIVE MINERAL ] ANALYSES
|»S M
INCLUDING
S O D I U M A N D FLUORINE •
Proximate analyses ·
and amino acid assays *
Vitamin
Screening
of compounds for insecticidal, fungicidal, and bactericidal properties PROJECT RESEARCH AND CONSULTATION
**«WISCONSIN ALUMNI « S X . RESEARCH FOUNDATION P.O. BOX 2059-C ·
MADISON 1, WIS.
Tl RON (disodium-l,2-dihydroxybenzene-3,5disulfonate) For the Determination of Iron A sensitive, stable reagent, developed by John H. Yoe and A. Letcher Jones, University of Virginia (Reference—Industrial and Engineering Chemistry, Analytical Edition, Vol. 16, p. 111-115, 194-1), for the colorimetric determination of ferric iron. The reagent may be used in either acid or alkaline medium. In alkaline medium it is sensitive to one part of iron in 100,000,000 parts of solution. In acid solution the sensitivity is one part in 30,000,000. For the Determination of TITANIUM (Method of Yoe & Armstrong) TIRON is an extremely sensitive reagent for the determination of TITANIUM (indicated sensitivity, 1 part of TITANIUM in 100,000,000 parts of solution). TIRON may be used to determine both Titanium and Iron in same solution. For the Determination of Molybdenum by Fritz Will and John H. Yoe Réf.: Analytica Chimica Acta, Vol. 8 (1953) 546-557 Used successfully for colorimetric determination of Molybdenum in steels and other materials. Practical sensitivity of 0.1 ppm. Molybdenum.
LaMotte Chemical Products Company Dept. A.C.
owson 4, Md.
* R e g . U. S. P a t . Off.
76 A
ANALYTICAL
CHEMISTRY
