Proof of our established policy...
To give you ULTRA
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service by providing the widest variety of graphite grades George T. Sermon, Près.
. . . to help you solve the increasing number of sophisticated spectrographic analyses Just as a variety of specialized drugs is a boon to modern medicine, so, today, a selection of different graphite grades is vital for your creative analytical techniques. For this reason, United has led the industry for years in offering the widest variety of spectroscopic graphites: U - 1 — A n excellent grade featuring above average density and normal electrical resistivity. U - 2 — Universally accepted spectrographic material due to its average density and superior electrical resistivity. U F 4 S — Used when it is desirable to have electrodes of above average density and high electrical resistivity.
UNITED
U - 7 — For those desiring the densest grade of spectroscopic graphite commercially obtainable combined with outstanding electrical resistivity, United recommends U-7. C a r b o n G r a d e — provides the ultimate in high electrical resistivity plus low thermal conductivity for spectrographic electrodes. The above grades of spectroscopic graphite are all of the highest ultra-pure quality. The knowing spectroscopist never confuses quality with grade. From United, you have an unequalled selection of physical properties to help you achieve the finest results for your particular work. Technical service, data sheets and samples are readily available to you . . . we'll welcome your inquiry.
carbon products co. P.O. B O X 7 4 7 - A Circle No. 106 on Readers' Service Card
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ANALYTICAL CHEMISTRY
B A Y CITY,
MICHIGAN
