FOR T H E U L T I M A T E I N U N I F O R M P U R I T Y , GET
NATIONAL TRADE-MARK
ELECTRODES
Preformed S h a p e s Stock Lengths • PURITY OF FIRST IMPORTANCE • FAST, LOW-COST ANALYSIS GROWING Speed and accuracy have combined to establish spectroscopy as the preferred method of analysis for research and control in many different fields. Its already wide scope of application has saved industry countless man-hours and money . . . promises to continue g r o w i n g at record rates as new techniques evolve and more cost-conscious producers recognize its advantages over wet chemistry for both quantitative and qualitative determinations.
"NATIONAL"
A m o n g the factors most strongly affecting accuracy of the spectrograph are contamination and trace-element impurities in the electrode. These considerations are foremost in N A T I O N A L CARBON'S manufacturing and packaging techniques. W h e t h e r you order " N a t i o n a l " preformed shapes in their air-tight glass containers or prefer to make your own from our carefully packaged stock lengths, you are sure of purity that is uniform piece-to-piece and shipment-toshipment — from factory to you.
ELECTRODES AND POWDERS...THE The term "National"
PUREST EVER MADE
is a registered trade-mark of Union Carbide and Carbon
Corporation
NATIONAL CARBON COMPANY A Division o f Union Carbide a n d Carbon Corporation · 3 0 East 4 2 n d S t r e e t , New Y o r k 1 7 , Ν . Υ .
District Sales Offices: Atlanta, Chicago, Dallas, Kansas City, New York, Pittsburgh, San Francisco
30 A
ANALYTICAL
CHEMISTRY
