NUCLEATION PHENOMENA T h e Eighteenth Annual Christmas C hemica I Engineering Symposium presented in part before t h e ACS Division of Industrial and Engineering Chemistry a t Northwestern University, Evanston, Ill., December 27-28, 1951.
SUPERSATURATED INORGANIC SALT SOLUTIONS Maria Telkes 1308
Theory, Review NUCLEATION I N PHASE TRANSITIONS Vlctor K. La Mer. LIQUID AND CRYSTAL NUCLEATIONS Guv M. Pound. LIQUID DROP MODEL Howard Reine SUPERSATURATED WATER VAPOR Worth H. Rodebush NUCLEATION CATALYSTS David Turnbull and Bernard Vonnegut.
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1270 1278 1284 1289 1292
Nucleation from Gases DIFFUSION CLOUD CHAMBER Alexander Lensadorf, Jr. FORMATION OF ICE CRYSTALS I N AIR Vincent 1. Schaefsr LIESEGANG RINGS OF AMMONIUM CHLORIDE W. H. Johnston and Peter J. Manno.
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1298
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1300
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1304
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1305
Nucleation from Llquids SUCROSE SOLUTIONS Andrew Vannook and nom Frulla
................. BUBBLE FORMATION I N LIQUIDS LOUISBernath . . . . . . . . . . . . . . . . . 1310 QUIET SUPERSATURATED KCI SOLUTIONS' George W. Prsckshot and G. 0. Brown . . . . . . 1314 Nutlmtlon from Solids THEORY OF NUCLEATION I N SOLIDS Roman Smoluchowski.
. . . . . . . . . . . . . 1321 PRECIPITATION FROM SOLID SOLUTION J. C. Fisher. J. H. Hoiiomon. and 1.0. Lsschen. . . 1324 FLOW AND FRACTURE MARKINGS Wallsr George . . . . . . . . . . . . . . . . . 1328 PHOTOGRAPHIC LATENT IMAGE J.H.Webb . . . . . . . . . . . . . . . . . . 1331 DECOMPOSITION OF BARIUM AZIDE' F. C. Tompkins. . . . . . . . . . . . . . . . . 1336 1
Not presented at Christmas Symposium.
Although nucleation phenomena are of vital importance in chemical and chemical engineering operations-from precipitation in quantitative analysis to the texture of ice cream-much of the research has been conducted In the fields of physics, meteorology, metallurgy, and even mlneraicgy. Therefore, in planning this somewhat unusual Christmas Symposium, the committee was most fortunate In obtaining the aid of leaders in several of these fields. The symposium represents the first full-scale coverage of theory and application of nucleation phenomena ever given the subject In this country. It Includes broad review papers to bring together the developments from the widely differing fields of interest and to demonstrate the similarity of nucleation phenomena, whether In rain making or in photographic prowssos. There are also good examplea-not necessarily new m a t e r i a l 4 illustrate the importance of 6he reactions, and finally them a m reports of new theory and stlmulatlng research results. CHARLES M. COOPER 1269
