QUALITY

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QUALITY

VERSATILE, HANDY HOT PLATE

is

for both exacting requirements and general healing in Laboratories and Plants.

Obvious

CAST ALUMINUM 6 » ,

in

RLPPureLatexLaboratory Tubing 24 SIZES Wa :

ϋ 1/b" 1/8" 3/14" :s/!.v 3/16" \/X 1/4" 1/4" 1/i" ΪΊ6' J/!i" VIS" 5/16" 3/3" 3/8" 3/5" 3/H· 1/2' 1/?" 1//"

χ « .·. κ χ χ χ χ χ χ χ > χ χ χ χ χ χ χ χ

1/32" i/lV 1/lii" V'iî" ;/S" 1/16" 3/32" 1/3" 3/16" 1/16" 3/32" 1/8" 3/16" 1/16 3/32" 1/8" 3/1Λ" 3/32" 1/8" J/16"

1-2"

χ

:/••!"

5/8 3/4" 1"

χ 1/8" χ 1/8" χ 1/8"

r

I f l p pL

HEATS TO 700 f. IN Π MINUTES

P u r e liquid latex, no min­ erals or coagulants u s e d — a b s o l u t e l y non-toxic — strong—seamless, smooth inside a n d o u t — l o n g life.

gravity

Strength—4500 lbs. square

.98

per

uses. Wide temperature range, exceptionally close control—less than S°F. variation. Completely variable control over full tem­ perature range. Compact, convenient—plugs into 110 V., 50/60 Cy. Only $19.70. Write for literature and nearest dealer's name.

in.

Elasticity—Elongation

850% Resiliency—Durometer hardness

35 — 5

Ask your laboratory supplier for samples

Rubber Latex Products, Inc. Cuyahoga

AIR CHANNEL BETWEEN TOP PLATE — AND STEEL CASE PREVENTS EXCESSIVE CASE TEMPERATURES

sdjskdjskdsjdksjdd dskdsdlldfldlldlfldlf sdksdlsdsdlslddllsl You'llssjdfsskllsaldsalds find this the ideal unit for a wide sakjdksdksdsldlss varietysjdjdjdjsndjiwhwhrwn of critical1900 andHOT routine PLATE laboratory

PHYSICAL PROPERTIES Purity —Specific

—

Falls, O h i o

TEMCO

HOT PLATES & FURNACES

® THERMO ELECTRIC MFG. CO.

Circle number 52 A-1 on Readers' Service Card, nage 41 A

478 HUFF ST., DUBUQUE, IOWA

Circle number 52 A-2 on Readers' Service Card, page 41 A

P u m p liquids, gases, solids in solution Just place connecting tubes in

large Sigmamotor

Pump! • Wavelike action of steel ,, fingers forces liquid through the tubing. M a t e r i a l in tubing never touches pump. Stops contamination a n d corrosion. Excellent for handling of corrosive solution Smaller unit w i t h capacities to gallons per hour

$19500 3 0 $5500

SIGMAMOTOR Inc. 5 0 0 Vernon Street

•

Middleport, Ν Υ

Circle number 52 A-3 on Readers' Service Card, page 41 A

52 A

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 less than 30 seconds b y non-technical personnel. Equipment is 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. X, Y, & 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. 10 MILL ROAD, HATBORO, PA. Circle number 52 A-4 on Readers' Service Card, page 41 A

ANALYTICAL

CHEMISTRY