INDEX TO ADVERTISERS Ace Glass, Inc 43 A Ainaworth & Sons, Inc., Wm 20 A Applied Research Laboratories 25 A Baker Chemical Co., J. Τ 5A Bausch & Lomb Optical Co 4th Cover Brinkmann & Co., C. A 51 A Clay-Adams Co. Inc 34 A Central Scientific Co 10 A Coleman Instruments, Inc 32A 9 Consolidated Engineering Corp A Coors Porcelain Co 56 A Corning Glass Works 46 A DuMont Laboratories, Inc., Allen Β 23 A Eastman Kodak Co 27 A Eberbach Corp 50 A Farrand Optical Co. Inc 57 A Fisher Scientific Co 2nd Cover; 8 A Fish-Schurman Corp. 50 A Floridin Co 53 A General Electric Company 28 A General Laboratory Supply Co 49 A General Radio Company 6A Greiner Co., Emil. 12 A Harshaw Scientific Co 55 A International Equipment Co. 7A Kimble Glass Div 3rd Cover Klett Mfg. Co 48 A; 53 A Laboratory Construction Co 45 A Laboratory Equipment Corp ^*A Librascope, Inc 15 A Lindberg Engineering Co 11A Machlett & Son, Ε 22 A Mallinckrodt Chemical Works 39 A-42 A, Manufacturers Engineering & Equipment Corp 57 A Matheson, Coleman & Bell Co 50 A Merck & Co. Inc 58 A National Carbon Div., Union Carbide & Carbon Corp 30 A T N ew York Laboratory Supply Co. Inc 48 A Palo Laboratory Supplies, Inc 51 A Parr Instrument Co 52 A Perkin-Elmer Corp 14 A Peterson & Co. Inc., Leonard 13 A Photovolt Corp 50 A; 52 A; 56 A Podbielniak, Inc 16 A-17 A Sargent & Co., E. II 19 A Schleicher & Schuell Co., Carl 47 A Selas Corp. of America 24 A Sigmamotor, Inc • 49 A Specialized Instruments Corp 35 A Thermo Electric Mfg. Co 49 A Thomas Co., Arthur H ISA U. S. Stoneware Co 44 A Welch Scientific Co., W. M 13 A; 36 A. Wilkens-Anderson Co 4A
COLORMASTER DIFFERENTIAL COLORIMETER *
COLOR MEASUREMENTS made in less than 30 seconds! The Colormaster Differential Colorimeter* is the latest development in color measuring equipment. A complete set of color measurements can be made in lees than 30 seconds by non-technical personnel. Equipment ia direct reading on a low backlash dial, and is mechanically rugged, and stable. Dial linearity is within approx. 0.2% from 100% to 10% reflection or transmission and can be extended below 10% with approx. 0.02% linearity. • Three color filters enable % transmission or reflection to be read directly on front Panel Dial to within an estimated 0.01%. • Simple calculation converts dial readings to I.C.I. Χ, Ϋ, & Ζ functions. • Operates from 115 Volt 60 cycle line. * Similar to instrument described at the March, 1952 meet ing of the Optical Society of America by L. G. Glasser and D. J. Troy of E. I. du Pont de Nemours & Co. Write for Complete Information
MANUFACTURERS ENGINEERING & EQUIPMENT CORP. » MILL ROAD, HATB0R0, PA.
DIRECTORY Laboratory Supply Center
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Calibration Chemicals Clark Microanalytical Laboratory Custom Chemical Laboratories Daylight Vacuum Products Co. James Instrument Co. LaMotte Chemical Products Co. Microchemical Specialties Co. Wilkens-Anderson Co. Wisconsin Alumni Research Foundation
M0N0CHR0MAT0R * • *
REINHOLD PUBLISHING CORPORATION Advertising Management for the American Chemical Society Publications, Merald Lue, Advertising Sales Manager, ACS Publications 330 W. 42nd St.» New York 36, Ν. Υ. SALES REPRESENTATIVES James J. Sullivan, Advertising Sales Manager New York 36-BRyant 9-4430; James J. Sullivan Cleveland 14-NBC Bldg., 815 Superior Ave., N.E., PRospect 1-5583; William A. Faville Chicago 2 - 1 1 1 W. Washington St., RAndolph 6-8497; G. E. Cochran, Vice-President, Reinhold Publishing Corp.; District Manager—Frederick C. Dorr; District Manager, Southern States (Ala., Ga., Fia., Ky., Miss., Tenu.) 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 Montrose Blvd., LYnchburg 6711; Frank N. Vickrey Denver 2—McDonald-Thompson, Colorado National Bank Bldg., Keystone 4669; Robert H. Heidersbach
V O L U M E 2 6, NO. 2, F E B R U A R Y
FARRAND Ultraviolet and Visible Region
1954
•
75mm Free Aperture F:4 2 0 0 to 9 5 0 Millimicrons Quartz-Lithium Fluoride Optics f o r Ultraviolet Glass Optical System for Visible Region
The Farrand Monochromator is ideal for use in the ultraviolet and visible spectral regions, particularly for measurements involving low light levels. The unusually large free aper ture and the speed of the optical system afford high dispersion, transmission, reso lution and spectral purity. Write for Farrand Bulletin # 8 0 1 . It gives complete details of design and performance.
FARRAND OPTICAL CO., Inc.
PRECISION \ _ OPTICS. • • ELECTRONIC § • ANO Η SCIENTIFIC § • INSTRUMENTS^™
BRONX BLVD. a n d EAST 2 3 8 t h ST., NEW YORK 7 0 , N.Y.
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