SECRETARY'S REPORT 171 



The Special Eeports of the Astrophysical Observatory distribute 

 catalogs of satellite observations, orbital data, and preliminary results 

 of data analysis prior to journal publication. Numbers 90 through 126, 

 issued during the year, contain the following material : 



No. 99, July 16, 1962. 



Chemical analysis of 643 particles collected by high-altitude aircraft and 

 balloons, by F. B. Riggs, Jr., F. AV. Wright, and P. W. Hodge. 

 No. 100, July 30, 1962. 



Accurate drag determinations for eight artificial satellites ; atmospheric 

 densities and temperatures, by L. G. Jacchia and J. Slowey. 

 No. 101, July 31, 19G2. 



Numerical results from orbits, by Y. Kozai. 

 No. 102 (P-5), August 27. 1962. 



Catalog of precisely reduced observations : Satellite 1959 ol for the entire 

 jear 1960, prepared by J. MacDonald, K. Haramuudanis, et al. 

 No. 103, August 28, 1962. 



Satellite orbital data: Satellite 1959 Eta (Vanguard III), Sept. 1, 1960- 

 Dec. 31, 1961, and Satellite 1960 d (Echo I), Jan. 1-Dec. 31, 1961, by B. 

 Miller, compiled by I. G. Izsak. 

 No. 104 (P-6), September 10, 1962. 



Catalog of precisely reduced observations: Satellite 1961 SI from launch 

 Feb. 16-June 30, 1961, prepared by J. MacDonald et al. 

 No. 105, September 28, 1962. 



The trajectory of tektites, by G. S. Hawkins and S. K. Rosenthal. 

 No. 106 (P-7), November 1, 1962. 



Catalog of precisely reduced observations: Satellite 1959 al from Jan. 1- 

 June 30, 1961 ; Satellite 1959 77I from Jan. 1-June 30, 1961, prepared by 

 P. Stem. 

 No. 107, November 9, 1962. 



On some singular orbits of an earth-moon satellite v?ith a high area-mass 

 ratio, by G. Colombo and D. A. Lautmau. 

 No. 108, November 20, 1962. 



On the libration orbits of a particle near the triangular point in the semi- 

 restricted three-body problem, by G. Colombo, D. A. Lautman, and 

 C. Munford. 

 No. 109, December 21, 1962. 



Re-entry and recovery of fragments of satellite 1960 el, by C. A. Lundquist, 

 R. C. Vanderburgh, W. A. Munn, D. Tilles, E. L. Fireman, and J. DeFelice. 

 No. 110, December 14, 1962. 



Project Celescope, an astrophysical reconnaissance satellite, edited by R. J. 

 Davis. 

 No. Ill, December 15, 1962. 



Possible contributions of space experiments to cometary physics, by P. 

 Swings. 

 No. 112, January 21, 1963. 



On the secular decrease in the inclination of artificial satellites, by R. C. 

 Nigam. 



