Keep things rolling in your laboratory 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 by 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.
Save steps, time, breakage and labor costs with LABCONO specialized laboratory carts. Proctor and Gamble, Dow Chemical, University o f California, Armour and Company, and many other laboratories are using them to cut costs and lighten laboratory work. Pan-type carts, wire basket glassware carts, portable tables, 2-3-4-decker carts, Kjeldahl carts—18 different models in a l l . See your laboratory supply dealer or write the manufacturer t o d a y for free folio JJ-54.
LABORATORY
CONSTRUCTIOM
* Similar to instrument described at the March, 1952 meet ing of the Optical Society of America by L. G. Glaaser and D. 3. Troy of E. I. du Pont de Nemours & Co. Writ* for Complet* Information
MANUFACTURERS ENGINEERING & EQUIPMENT CORP.
COMPANY
I I MILL R0A0, HATB0RO, PA.
1 1 1 5 H o l m e s Street Kansas C i t y , M i s s o u r i Circle No. 72 A-1 on Reader*' Service Card, page 57 A
O P T I C A L
Circle
I N S T R U M E N T S
No. 72 A-2 on Readers' Service
Card, page 97 A
SINCE 1857, GOTTINGEN, ALLIED ZONE
R A D I C A L L Y N E W STYLE POLARIZING
MICROSCOPE
with
INCLINED
OBSERVATION
TUBE.
• Inclined observation tube with adjustable Amici-Bertrand lens, iris diaphragm extensible eye-piece sleeve. • Dust-proof, integral tube analyser with degree scale, rotating about 180°, coated Telan lens system to establish telecentric pencil of rays and eliminate astigmatism. • Filter polarizer and filter analyser of great light-transmission; neutral grey tint. • Ball-bearing, rotating stage, graduated into 360° with vernier reading to 0.1°, with clamping screw, fine rotation adjustment and click-stop device to click-stop at 45°-intervals at any desired points. • Low position, co-axial coarse and fine motions, controlled from either side. • Objectives furnished in eccentric mounts for quick and accurate alignment. • May be equipped with integral illuminator permitting illumination by the Koehler principle. • Phase Contrast Condenser and complete set of phase objectives.
CARL ZEISS, INC., 4es F,FTH AVE~ NEW YORK ,7 · Ν · γ · write for literature
Guaranteed Uninterrupted. Repair Service For farther information, circle number 72 A-3 on Readers' Service Card, page 57 A
72A
ANALYTICAL
CHEMISTRY
