V O L U M E 2 5, NO. 2, F E B R U A R Y 1 9 5 3 47 A

INDEX TO ADVERTISERS Aloe Cc A. S.. .. 12 A

Baker Chemical Co., J. Τ 5 A tiausrh & Lomb Optical Co 4th Cover Beckman Instruments, Inc 24 A Blue-M Electric Co 48 A Bow.ser Technical Refrigeration, Div. of Bowser, Inc 34 A Brook field Engineering; Laboratories, I tic 30 A

Carver, Inc., Fred S Central Scientific Co Chicago Apparatus Co Coleman Instruments, Inc.. Coois Porcelain Co

Dimco-Cray Co.

22 A 8 A

45 A 20 A 39 A

15 A

Eastman Kodak Co Eberbach Corp Electric Hotpaek Co. inc.

Furrand Optical Co. Inc. . Fisher Scientific Co Fish-Schurman Corp

26 A 45 A 40 A

General Electric <'« General Radio Co. Greiner Co., Emil.

X-Ray Dept.

44 A .2nd Cover

42 A

ffarshaw Scientific I'D

International Eimiprn

•Jarrell-Ash Co

10 A 33 A 14 A

23 A

40 A Kimble Glass Div 3rd Cover Klett Manufacturing Co 39 A. 43 A Laboratory Construction Co 41 A LaMotte Chemical Products Co 44 A Leitz, Inc., Ε 17 A Lindberg Engineering Co 29 A Liston-Becker Instrument Co. Inc. 36 A

Machlett & Son, F 35 A Mallinekrodfc Chemical Works 25 A Merck & Co. Inc 11 A Meyer Scientific Supply Co. Inc 42 A

National Carbon i)iv. t Union Carbide & Carbon Corp 13 A New York Laboratory Supply Co. Inc 38 A North American Philips Co. Inc 43 A

Owens-Illinois Glass Co 3rd Cover

Parr Instrument < -o 45 A Perkin-Elmer Corp 28 A Peterson & Co. Inc., Leonard 15 A Photovolt Corp 40 A, 42 A. 46 A

Research Vacuum Supply Co 42 A

Sanborn Co. 0 A Sargent & Co., B. II 10 A Schleicher *fc Schuell Co 7 A Selas Corp. of America 37 A Specialized Instruments Corp 10 A Standard Scientific Supply Corp 37 A Superior Electric Co 27 A

Taber Instrument Corp 47 A Thermo Electric Mfg. Co 41 A Thomas Co., Arthur Κ 18 A

Welch Scientific Co., \V. M. Wiley & Sons, Inc., ,ΤοΙιπ . . Wilkens-Anderson Co

30 A 41 A

4 A

DIRECTORY Laboratory Supply Center. . .

Cargille Laboratories, ii Wilkens-Anderson Co. Wisconsin Alumni Ro*n

v., R. P. reh Foundation

44 A

REINHOLD PUBLISHING CORPORATION Advertising Management for the

American Chemical Society Publications Mcrald Lue, Advertising Sales Manager, ACS Publications

330 W. 42nd St., New York 36, Ν. Υ. ADVERTISING SALES REPRESENTATIVES James } . Sullivan, Advertising Sales Manager

New York 36—BRyant 9-4430; James J. Sullivan Cleveland 14 —NBC Bldg., 815 Superior Ave., N.E., PRospcct 1-5583

—Rod ne v D. long, Cleveland Manager» Reinhold Publishing Corp. Chicago 2—111 W. Washington St., RAndolph 6-8497; G. E. Coch­

ran, Vice-President, Reinhold Publishing Corp.; District Manager —Frederick C. Dorr

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; Κ, Τ. Thompson

Seattle 1-McDonald-Thompson, Terminal Sales Bldg., Main 3860; Hurrv A!>ne\

Dallas 5-McDonald-Thompson, 6617 Snider Plaza, Logan 6283; Richard A. Worthington

Denver 2-McDonald-Thompson, Colorado National Bank Bldg., Keystone 4669; Robert H. Heidersbach

You're ALWAYS RIGHT with this

Model 140 TABER ABRASER

Here's the instrument that the whole world accepts as the standard abrasion or wear tester for plastics, paints, linoleum, rubber and textiles. Simulates actual wear con­ditions during test and gives an accurate numerical index for your report . Send for booklet below for all the facts.

SHEAR HARDNESS and DIAMOND SCRATCH TESTER

Tests quality of plastic material and plastic coated sur­faces to resist scratches, digs, scrapes and other physical

damage not classed as -ma00 normal wear. Handles

specimens from thin plate to Ά" thickness. Used everywhere for precision perfect tests.

The Taber STIFFNESS GAUGE Determines both INITIAL and NORMAL stiff­ness of sheet and wire specimens and gives report from DIRECT READING. Precision shear cuts exact specimens from paper or plastic (up co 20 pt.) to eliminate possible variation in results.

Taber INSTRUMENT CORPORATION SECTION 102

111 Goundry St., North Tonawanda, Ν. Υ. • Please send me booklet on Taber Abraser D Please send me booklet on Taber Hardness and Scratch Tester C Please send me booklet on Taber Stiffness Gauge

NAME

COMPANY

ADDRESS

CITY ZONE. .STATE.

t ;

Abrasion Resistance Tester !