. .
EDITORIAL
INDUSTRIAL AND ENGINEERING CHEMISTRY E d i t o r , D A V I D E. GUSHEE Editorial Headquarters
1155 S i x t e e n t h St., N.W., W a s h i n g t o n D. C. 20036 P h o n e 202-737-3337 $eletype W A 23 Assistant E d i t o r s : E l s p e t h M a i n l a n d , J o s e p h H. S. H a g g i n , John A . K i n g M a n a g e r , R e s e a r c h Results Service: Stella A n d e r s o n Layout a n d Production J o s e p h J a c o b s , Art Director, L e r o y C o r c o r a n , Bill C a l d w e l l (Layout) Production-Easton,
State of the Art in Nucleation
Pa.
Associate E d i t o r : Charlotte C. S a y r e
he Symposium on Nucleation Phenomena to be held this June a t
T ACS headquarters in Washington (see page 17 for details) is the
Eastern Editorial B u r e a u M a n a g e r : Walter S . F e d o r ( N e w Y o r k ) N e w Y o r k , N . Y . 10017, 733 T h i r d A v e . Assistant E d i t o r : L e o n Critides A D V I S O R Y B O A R D T h o m a s B a r o n , R. B. Beckm a n n C. 0. Bennett, E. G. Bobalek, F. G . C i a p e t t a , J. J. ‘Fischer B r a g e G o l d i n g , J o h n H a p p e l , E . F. Johnson A. Jonke, F. C. M c G r e w , A . R. Rescorla, A r t h u r ‘ R o s e , B. H. Sage, J o s e p h S t e w a r t , T. J. Williams
A.
* AMERICAN CHEMICAL SOCIETY PUBLICATIONS I155 Sixteenth St., N . W . , Washington, D . C. 20036 D i r e c t o r of Publications, R i c h a r d L. K e n y o n Assistant D i r e c t o r of Publications, R i c h a r d H. B e l k n a p D i r e c t o r of Business O p e r a t i o n s , J o s e p h H. K u n e y E x e c u t i v e Assistant t o the D i r e c t o r of Publications, R o d n e y N. Hader Assistant t o the D i r e c t o r of Publications, W i l l i a m Q. H u l l Advertising M a n a g e m e n t REINHOLD PUBLISHING CORP.
SUBSCRIPTION SERVJCE: All communications rclatcd to handling of subscriptions, including CHANGE OF ADDRESS, should bc sent to Subscription Service Department, American Chemical Society, 1155 16th St., N.W., Washington, D. C. 20036. Change of addrcss notification should include both old and new addresses and a mailing label from a recent issue. Allow four weeks for change t o become cffectivc. SUBSCRIPTION RATES: INDUSTRIAL AND ENGINEERI N G CHEMISTRY, published monthly, is sold r d y in conrhination with onc or more of thc following IBEC quarterlies: I&EC Process Design and Devclopmcnt; I&EC Fundamentals; I&EC Product Research and Devclopmcnt; a t thcse combination rates: Canadian Postage (Per Year)
1965 SUBSCRIPTION
I year
RATES 2 yrarr 3 years
American Chemicai Socirty Msmhwr only: IBEC and 1 Quarterly I&EC and 2 Quarterlies I&EC and 3 Quarterlies
$1.50 2.00
2.50
$ 4.00 $ 6.00 $ 8.00 7.00 10.00 13.00 10.00 14.00 18.00
Nonmemhrr~for suhscriptionr going to U.S.and Gnada:
I&EC and 1 Quarterly I&EC and 2 Quarterlies I&EC and 3 Quarterlies
$1.50 2.00 2.50
$ 5.00 $ 7.00 $ 9.00
8.50 12.00
11.50
14.50
16.00
20.00
Basic subscription t o monthly INDUSTRIAL AND ENGINEERING CHEMISTRY is valued as follows: ACS mcmbers,
1 ycar, $1.50; 2 ycars, $3.50; 3 years, $4.50; nonmcmbcrs 1 year, $3.00; 2 years, $4.00; 3 ycarr, $5.00. Howcvcr, separitc
subscriptions to eirhcr thc monthly or the quarterlies will not be accented. Singie Copies: current $2.00 (includes copy of this month’s quarterly). Postage: Canada, $0.15. Rates for back isrucs and volumes are available from Spccial Issues Sales Dcpartmcnt, 1155 Sixtecnth St., N.W., Washington, D. C. 20036. Claims for missing numbcrs will not be allowed if reccivcd more than 60 days from datc of mailing plus time normally required for postal delivery of journal and claim. No claims allowed bccaurc of failure to notify the Subscription Service Dcpartment of a changc of address, or bccausc copy is “missing from filcs.” Published monthly by the American Chcmical Socicty, from 20th and Northampton Sts., Easton, Pa. 18043. Second class postage paid at Easton, Pa.
second state-of-the-art symposium resulting from the cooperative venture between I&EC and the ACS Division of Industrial and Engineering Chemistry. Last year’s topic was “The Chemistry and Physics of Interfaces,” articles from which are now appearing in our pages. For example, this month’s cover article on aqueous interfaces stems from it. With plans for the second symposium well advanced, a word about this special program is in order. One of the functions of I&EC monthly is to organize applied chemical knowledge by means of critical survey and review articles, to help the industrially employed technical man maintain his general technical competence in the face of the shortage of time and the flood of new information fragments in the literature. Some bodies of knowledge can be handled by individual articles. Sometimes the Annual Review seems to be the best format. But when you come to a vast, fundamental, generally applicable phenomenon, such as the interface or nucleation, a coherently planned state-of-the-art treatment has great merit. So it was that we-the Division and the editors-have settled upon the double-barreled approach of the symposium and subsequent publication and combined reprinting as the technique to generate critical, cohesive reviews of these subject areas and to disseminate the knowledge to you who can use it in attacking your technical problems. Meanwhile, as has always been the case, the Division National Meeting programs and the I&EC quarterlies carry out the equally important traditional literature function of presenting new bits of knowledge as they are generated. Alan Michaels, program chairman for the nucleation symposium, has brought together a group of speakers expert in different aspects of nucleation-from physics, from chemistry, from chemical engineering, and ranging in orientation from theoretical foundations to practical uses of the phenomenon. In many ways, the program resembles the 18th Annual Christmas Chemical Engineering Symposium which the Division held in 1951 (published in I&EC, June 1952, pages 1269-1338). The 1951 symposium was the first full scale coverage of theory and application of nucleation phenomena ever given in this country; it therefore seems fitting to examine this subject-so important in chemical and chemical engineering operations-from the same sponsorship and with the same wide-ranging intellectual framework plus the benefit of 14 years of intensive development and use. Those of you who attended the 1951 symposium may remember the sense of excitement that swept it. This was cross-fertilization, the interdisciplinary approach to the transfer of expertise from one area of specialization to other areas where it hadn’t been fully utilized. We hope that the same intellectual stimulation will occur this time.
VOL 57
NO. 4 A P R I L 1 9 6 5
.._--
...__I_
.
”_
. .- .
- .
5
-