106 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1959 
Wuitney, ©. A. The structure of the high atmosphere. I. Linear models. 
Spec. Rep. No. 21, pp. 1-12, Feb. 27, 1959. 
The structure of the high atmosphere. II. A conduction model. Spec. 
Rep. No. 25, pp. 1-6, Apr. 20, 1959. 
Wuirtney, C. A., and Vets, G. A flashing satellite for geodetic studies. Spec. 
Rep. No. 19, pp. 9-19, Dec. 6, 1958. 
OTHER ACTIVITIES 
The Director, Dr. Jacchia, and Dr. Hynek attended meetings and 
participated in discussions of the 10th General Assembly of the Inter- 
national Astronomical Union in Moscow, August 1958. They visited 
various scientific institutions in the USSR. The Director presided at 
a symposium on astronomy from balloons, rockets, and satellites. 
The Director, Dr. Jacchia, and Dr. Hynek participated in the dis- 
cussions of the Fifth Congress of the Comité Special de ? Année Geo- 
physique Internationale (CSAGI) in Moscow. Dr. Jacchia pre- 
sented his study of the descent of Satellite 1957 Beta One, and served 
on the subcommittees for Rockets and Satellites and for Ionospheric 
Research. 
The Director attended the Ninth Congress of the International 
Astronautical Federation for 1958, in Amsterdam. 
Dr. Riggs attended the meeting of the Meteoritical Society held at 
Winslow, Ariz., and at the nearby Barringer Crater. 
Mr. Davis participated in the meetings of the Optical Society of 
America, October 1958. 
Dr. Gerhard F. Schilling participated in the Conferences on Satel- 
lite Launching at the National Academy of Sciences and at the Pen- 
tagon, October 1958. 
A Conference on Contemporary Geodesy was held in December 1958 
under the sponsorship of the American Geophysical Union in coopera- 
tion with the Smithsonian Astrophysical Observatory and Harvard 
College Observatory. The Director and various members of the staff 
participated in the discussions. 
Dr. Fireman gave a lecture, “Sampling the Solar System for Iso- 
topes,” in February 1959, at the American Museum of Natural His- 
tory, New York. 
Dr. Whitney presented papers, by invitation, to the American 
Meteorological Society, in Chicago, Ill.; to the American Rocket Soci- 
ety, in Cambridge, Mass.; and at a symposium held by the Rand 
Corporation, Santa Monica, Calif., in the spring of 1959. 
The Director took part in a Space Symposium sponsored by the 
National Aeronautics and Space Administration, and the American 
Physical Society in April 1959. 
Dr. Fireman attended a Conference on Meteors at the Karlinka In- 
stitute, Stockholm, Sweden, June 1959. 
