1632 A M E R I C A N P H Y S I C A L S O C I E T Y

radiation. When plotted against kt for / = 0.215, these calcu­lated curves had initial slopes in the ratio of SF/SB = 1-52. For our experiments (IF — IB = 0.215) this suggests that the ratio of apparent coefficients of diffusion through the two solvent holders was kF/kB= (4.1)/1.52 = 2.7±0.7. Since the ratio of porosities was also 2.7, this technique for apparent coefficients of diffusion may turn out to be of value in certain measurements of porosities.

i A. Gemant, J. Appl. Phys. 19, 1160 (1948).

55. On Some Special Stopping-Power Laws. MARGUERITE M. ROGERS,* Columbia College, AND F. T. ROGERS, jR.,*t University of South Carolina (to be read by title).—Several readily integrable special cases of the expression,

-dT/ds^ko+k-i/T+^T+kzs, (1)

TH E summer of 1955 will be remembered in the American Physical Society as the summer in

which we twice crossed the frontier. On the first of these two occasions we traversed the northern border, and assembled in Toronto on Wednesday, Thursday, and Friday, June 21-23. Some of us of course did not cross the frontier, for our Canadian members were on tha t side already. The invitation to meet in the halls of the University of Toronto had been extended to us by President Sidney Smith and by Professor W. H. Watson. The general manager of the meeting was Professor H . J . C. Ireton. He was aided by a great number of people a t the registration desk, a t the lanterns, and else­where—and we must not forget the ladies of the Depar tment of Physics who took the visiting ladies on excursions. Their names have not been listed, bu t we are grateful to all. We met in three buildings of the Universi ty: the McLennan Laboratory, the Mechanical Building, and the Wallberg Building. Nowhere were the halls too small, and yet the meeting was not inconsiderable in size.

This was a joint meeting (and our first) with the Canadian Association of Physicists, celebrating this year its ninth anniversay and tenth annual meeting. Their ten-minute papers were distributed through our programme. Their invited papers had been given on the two previous days ; our members were cordially invited, bu t regrettably few seemed able to come. The registration for the five days of

have been investigated. For (&0, &-i, &i, ^2) = (constant, 0, constant, 0), Eq. (1) yields Poncelet's1 well-known formula for range in terms of kinetic energy; for ko = ko(a-)f ki = k\(cr), and da-fds simply related to dT/ds, generalizations of Ponce­let's formula are obtained depending upon the functional dependencies in k0, ki. The cases (constant, constant, 0, 0) and (constant, 0, 0, constant) yield monotonic range-energy relations as do the two preceding ones; in the latter instance, however, range is severly limited by the values of &0, &2. These several special cases have been encountered in attempts to provide phenomenological explanations for selected data in terminal ballistics; in many instances the data are found not to be of meaningful precision or completeness.

* Assisted by the Quartermaster Research and Development Labora^ tories, U. S. Army.

f Assisted by the Office of Ordnance Research, U. S. Army. 1 Poncelet, Mem. Acad. d'Sciences, 15, 55 (1829).

the entire double meeting amounted to about four hundred. Wi th especial pleasure we noted tha t many physicists from as far away as Saskatoon and Vancouver, and some from Nova Scotia, had made the formidable journey.

Our Division of Electron Physics (R. L. Sproull, Chairman; H. D. Hagstrum, Secretary) made a notable contribution to the meeting, both by in­viting speakers and by stimulating its members to provide ten-minute papers. On the general pro­gramme, most of the invitations were issued to Canadian physicists and to physicists of univer­sities in the United States near to the border.

The banquet was held Thursday evening in the Sheraton Room of the King Edward Hotel, R. T . Birge presiding and having beside him the President of the Canadian Association, Larkin Kerwin, who greeted our members in the name of the Associ­ation. D. A. Keys gave an account of the recent development of physics in Canada which had no fault other than tha t of being too brief. The at tendance a t the dinner was 147. This was not the only festive occasion on the programme. The University of Toronto gave us an unprecedented reception Wednesday afternoon in the hall of a large gymnasium. T h e President and the Chancellor of the University and their wives received us, and liquid and solid refreshments were served. A crowd of several hundred responded warmly to this amiable invitation.

P H Y S I C A L R E V I E W V O L U M E 9 9 , N U M B E R 5 S E P T E M B E R 1 , 1 9 5 5

Proceedings of the American Physical Society

M I N U T E S OF T H E 1955 J U N E M E E T I N G AT T O R O N T O , CANADA

(Corresponding to Bulletin of the American Physical Society, Vol. 30, No. 4)

A M E R I C A N P H Y S I C A L S O C I E T Y 1633

The Council met Friday morning. It elected to Membership one hundred twenty-six candidates and to Fellowship three: the names follow.

Elected to Fellowship: A. N. Guthrie, F. de Hoffman, and W. W. Van Roosbroeck.

Elected to Membership: sStuart L. Adelman, sRaymond George Ammar, "Gerald Stanley Anderson, sSigurds Arajs, William Bryant Ard, Jr., sPeter Avakian, Emil Mike Banas, 9James Allen Barnes, sDonald Ray Behrendt, sWerner John Beyen, Devidas Raghunath Bhawalkar, sJoe Carroll Bradley, Robert Howell Bryan, sArthur Jerry Buslik, sNeal Payton Campbell, Tsu-shen Chang, Alan Gerald Chynoweth, sWilliam Max Cloud, William A. Conrad, Richard Bertram Curtis, sLawrence Fred Daum, sHoward Wesley Davis, Paul P. Day, sBernhard Irwin Deutch, Jacob Frederick Dewald, sNorman Emanuel Diana, sJohn Jacob Domingo, Donald D. Doughty, Bertram Wilson Downs, Jr., 8Ali Mohamed El-Atrash, sEugene Engels, Luis F. Garcia, ^Abraham Goldberg, sIshwar Chand Gupta, sWilliam R. Hagemeier, sJoseph David Harris, sHugh Brasher Haskell, sJohn Hayes, Nick Holonyak, Jr., sJohn Leonard Honsaker, Kenneth Ray Hovatter, William Butts Ittner, III , Harwick Johnson, sLeo Francis Johnson, sRobert Reed Johnston, sEmil Kazes, Jean Kern, sAhmad Ali Kheiralla, Robert Marion Kinkaid, Paul Bertram Kissinger, sDaniel J. Kleitman, Lawrence Fredric Krenzien, Herbert Kroemer, sLuichie Gioietta Kuo, sRichard Leon Lander, Simon Larach, Paul Christian Lauterbur, Jacob Jan Leen-dertse, sHarlan Wayne Lefevre, Don Bernett Lichtenberg, sAlbert John Lieber, sMichael David Lubin, Bruno Meinrad

A4, by J. G. Carver and T. F. Godlove. In the title, instead of Slow-Neutron Capture Resonances in Ta, W, and In, read Slow-Neutron Capture Resonances in Te, W, and In.

D3, by J. H. Meek. The author's name should read J. H. Meek instead of J. H. Meek.

F12, by Herbert Jehle, J. M. Yos, and W. L. Bade. A foot­note should be added to the title reading: Work supported by the Research Corporation and by the National Science Foundation.

G3, by Emerson William Pugh and J. E. Goldman. In line 17, instead of 2.04±0.07X10-~6, read 1.89±0.05X10"6. Inline 18, instead of 1.99±0.07XK)-6, read 1.81 ±0.05X10~6 .

L6, by M. T. Thieme and E. Bleuler. In line 12, instead of " . . . levels at 2.15, 2.24, and 2.3 Mev were found. They are reached by allowed electron capture from Au194 whereas the decay to . . . " read "levels at 2.15, 2.22, and 2.3 Mev were

Liithi, sDavid Dexter Lynch, sRobert J. Malhiot, sRoger Manasse, Samuel S. Markowitz, sAlfred Smith Marotta, Joseph Maserjian, sCharles Witt Maynard, Robert Lawrence McCollor, sBilly Murray McCormac, Thomas Orestes Meeks, Jr., Franklin Meyer, sDavid Shuichi Moroi, Yoshinari Nakagawa, Clifford Vincent Nelson, sDonald Frederick Nelson, George Robert Newton, Robert George Nobles, Matthew Nowak, sWilliam David Ohlsen, sSherwood Ira Parker, sRoger Bruce Perkins, Karl-Birger Persson, Rolf W. Peter, sNorbert Thomas Porile, sJohn Stephen Posivak, sSinai Rand, Joseph Dewey Robinson, sRichard Wilson Roddy, Jr., James Kostes Roros, sLawrence Rosenson, sAmrit Sagar, Wayne W. Scanlon, Carl B. Schoch, sClirrord Rodney Schu­macher, sRoger Walz Shaw, Shay J. Sheheen, sJoseph J. Sheppard, Jr., sAnton Arthur Sinisgalli, sRobert Folinsbee Snider, sPeter Pitirimovich Sorokin, sPeter Cedric Stein, sFloyd Wayne Stoller, Alexander Stolovy, sRobley Vane Stuart, Alex Ogden Taylor, Jr., Itsuro Teshima, Ernst Adolf Trendelenburg, William Joseph Turner, Guy Rene Vander-haeghe, aWilliam Anton Wallenmeyer, Alastair Ward, Roy Clemson Ward, Laurance Bliss Warner, Theodore S. Webb, Jr., James Paul Wesley, William Blaine White, Romayne Flemming Whitmer, sRonald Allen Workman, sMalcolm Cecil Younger, sHarold Saul Zapolsky, sMichael Raymond Zatzick, sJohn Richard Zener, and George John Zissis.

8—Student.

KARL K. DARROW, Secretary American Physical Society Columbia University New York 27, New York

found. They are reached by first forbidden electron capture from Au194. The decay to . . . ."

U3, by Robert W. Keyes. In line 7, instead of four, read three.

V8, by R. L. Fey and W. J. Graham. In line 8, instead of £>CP = 24.8, read £>aP = 22.7. In line 12, instead of 0.59 read 0.53 (mobility of Xe+).

W5, by L. Levitt and G. E. Tauber. In line 9, instead of "The energy was found to be of the order of —0.539 atomic units as compared with —0.529 atomic units" read "The energy was found to be of the same order as that . . . ."

Z10, by L. J. Varnerin, Jr., and J. H. Carmichael. A footnote should be added to the title reading: This research was sup­ported by the U. S. Air Force through the Office of Scientific Research, Air Research and Development Command.

Errata Pertaining to Abstracts A4, D3, F12, G3, L6, U3, V8, W5, and Z10