are being initiated in this area will be discussed along with potentialities and limitations of this resource. Edward Wenk, Jr., Robert Frosch, Stanley Cain, Robert White, and Herman Pollack. I. E. Wallen, Robert Abel, John Craven, Eugene E. Aubert, and Charles Drake. Hugh McLellan, Nicolas P. Fofonoff, John Isaacs, Frederick Vine, and J, Lamar Worzel. H. Burr Steinbach, Milner Schafer, G. K. Parman, John Ryther, and Donald Snyder. Man and Transportation (27—30 Dec.) Arranged by Paul Rosenberg (Paul Rosenberg Associ- ates, Pelham, N.Y.; Chairman, Section M-——Engineering), Newman A. Hall (Commission on Engineering Edu- cation, Washington, D.C.; Secretary, Section M—Engineer- ing), and Walter G, Berl (Applied Physics Laboratory, Johns Hopkins University). Topics: Opening Addresses; Traffic Flow and Congestion; Ground Transportation: Possibilities and Probabilities for Future Development; Future Modes of Air Transportation; Promising Urban Transportation Technology; Interaction of the Physical and Social Sciences in Transport Planning; Health and Transportation; and Automotive and Air Safety. The problems of modern transportation are more than the engineering problems of designing and constructing automobiles, highways, aircraft, airports, and ships. Transportation involves problems of sociology, economics, ecology, population distribution, and health. In the conviction that many scientific disciplines can make significant contributions to these problems, the Engineering Section (M) of the AAAS has arranged a series of eight interdisciplinary symposia on “Man and Transportation.” The symposia will cover the subjects of: traffic flow and congestion on the highways, in the cities, and in the air; future modes of ground andair transportation; relations of transportation to ecology, urban development, and health; and automobile and air safety. These symposia will be directed primarily to the interests of the multidisciplinary Do Life Processes Transcend Physics and Chemistry? (30 Dec.) An informal discussion between Gerald Holton, Michael Polanyi, John R. Platt, Ernest Nagel, and Barry Commoner will be held. MATHEMATICS(A) Computer-Aided Research (28 Dec.) Arranged by Wallace Givens (Argonne National Laboratory). The digital computer has, in two decades, become a fa- miliar tool to many working scientists. Imaginative and extensive use of the varied capabilities of a computer system as an integral part of theoretical research is the unifying theme of this Symposium. Cyrus Levinthal will use computer-generated films to show the structure of small molecules as well as of proteins. He will describe his employment of time-sharing techniques in order to provide opportunity for observation and modification of structures as an essential part of this research. Don L. Bunker will report on his studies of the rates and dynamics of chemical reactions using Monte Carlo techniques to accumulate information on randomly selected reaction events. Computer results will be compared with the outcome of molecular beam experiments as well as, in other cases, with predictions of theory. Both high arithmetic speed and large memory capacity are required, with some trade-off of one for the other possible. Part of the original impetus for the development of the modern digital computer came from the need to calculate at Los Alamos certain time-dependent fluid flows. The solution by difference-approximation methods of partial differential equations has continued to make heavy demands on the most powerful machines. Numerical experiments in fluid dynamics with output direct from the computer on film will be reported by C. W. Hirt. Wallace Givens, Cyrus Levinthal, Den L. Bunker, and audience which distinguishes an AAAS meeting, and sec- C. W. Hirt. statistics and mathematics of traffic flow; electric- and nu- Second Annual Symposium on Mathematical Questions in Biology (27 Dec.) ondarily to transportation specialists. For example, some of the papers discuss: air pollution from automobiles; psychology of automobile accidents; agriculture and transportation; clear-powered automobiles; and the SST. Claiborne Pell, Constantinos A. Doxiades, and Colin Buchanan. Roger H. Gilman, Denos G. Gazis, Martin A. Warskow, R. M, Thomas, and Henry A. Barnes. Siegfried M. Breuning, Richard H. Shackson, Aaron J. Gellman, Victor Wouk, and William W. Seifert. Raymond L. Bisplinghoff, Arnold F. Kossar, John Stack, H. G. Edler, and Stephen G. Saltzman. Sumner Myers, Morton I. Weinberg, Kay L. Neilson, William H. Avery, Maurice Sulkin, and John D. Garcia. Robert P. Whorf, Edwin T. Haefele, Marvin Manheim, and Donald P. McKinnon, W. G. Franken, Jerome and John Berl, E. S. Starkman, J. K. Patterson, Peter A. and Peter V. Siegel. Lederer. Robert Brenner, Ross A. McFarland, P. Stapp. 8 DECEMBER 1967 Arranged by the Joint Committee on Mathematics in the Life Sciences. Murray Gerstenhaber (University of Pennsylvania), Chairman; Hans J. Bremermann (University of California, Berkeley); and Alston S. Householder (Oak Ridge National Laboratory) The use of appropriate parts of mathematics in studies of ecological equations, mating behavior in animals, and neural networks illustrates the broad applicability of the subject in the biological sciences. Thus, Robert H. MacArthur employs graphical analysis, William Bossert uses stability concepts, and J. D. Cowan finds differential equations, Hamiltonian mechanics, and Gibbsian statistical mechanics appropriate. Murray Gerstenhaber, Robert H. MacArthur, William Boassert, and J. D. Cowan, 1347