c
1
ample, contain many individuals and groups whose responsibility it is to keep u p to date on specialized areas of knowledge. The National Referral Center has built on this federal base and tells I&EC that it has established good contacts in business, industry, and education as well as in government, and so is well equipped to make useful referrals in response to a wide variety of technical information needs. I&EC readers who feel that the Center’s capabilities may be of some assistance to them should write directly to : National Referral Center for Science and Technology, Library of Congress, Washington, D. C. 20540 or telephone 202-967-8265 for direct referral help. The Center is also interested in hearing from those with special capabilities in any scientific or technical area, so that they can be put on the list of those organizations and individuals to whom information requests can be referred. Erratum T h e following corrections should be noted in the paper “Equations of State” by J. J. Martin, IND. ENG. CHEM. 59 (12), 34 (December 1967). Equation 22 should have been instead of
(ER) dpR
(s) ~ T R VR
Equation 26 should be -3.85 B instead of -0.385 B Equation 29 should read
(
(VR 4-=4>
2,
in the denominator of the last term instead of: vR 0.086642)a
I
with HARDINGEO “XH” Dryers The Hardinge “XH” Dryer is adaptable to the handling of any material that can be dried in rotary equipment. Three types of feeding devices and many internal flight arrangements are available, one combination of which is best suited t o the material being processed.
2,
Table I1 should show column L as Equation 44 instead of Equation 43.
Write for bulletin 16-E-13
Reference (34) should be IND. ENG. CHEM.57 (3), 30 (1965) instead of IND. ENG. CHEM. FUNDAMENTALS 4, 369 (1965).
HARDINGE CO. METAL PRODUCTS DIV., KOPPERS COMPANY, INC., YORK, PA.
T h e name of one of the authors of the paper “A General Purpose Physical Data System” in IND. ENG. CHEM. 60 (2), 1, 70, 72 (February 1968) was incorrect as listed.
Engineered
Products
Clrcli No. 4 on Readers’ Senlee Card V O L 6 0 NO. 6
JUNE 1 9 6 8
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