84 ANNUAL REPORT SMITHSONIAN INSTITUTION, 196 2 



Veis, G., and Whipple, F. L. Experience in precision optical tracking of satel- 

 lite for geodesy. In H. C. van de Hulst, C. de Jager, and A. F. Moore, ed., 

 Space Research II, pp. 17-33, North Holland Publishing Co., Amsterdam, 

 19G1. 



Whipple, F. L. Dust halo. Space World, vol. 1, No. 8, pp. 20 ff, 1961. 



. Problems of the cometary nucleus. Astron. Journ. vol. 66, pp. 375-380, 



1961. 



. On the distribution of semimajor axes among comet orbits. Astron. 



Journ., vol. 67, pp. 1-9, 1962. 



. Report of Sub-commission 22a on meteorites. In D. H. Sadler, ed.. 



Trans. Intern. Astron. Union, Reports on astronomy, vol. XIA, pp. 213-227, 

 Academic Press, New York, 1962. 



Whitney, C. A. Determination of atmospheric densities from satellite observa- 

 tions. Ann. Geophys., vol. 17, pp. 237-244, 1961. 



Wood, J. A. Chondrules and the origin of the terrestrial planets. Nature, vol. 

 194, pp. 127-130, 1902. 



Zadunaisky, p. E. ; Shapiro, I. I. ; and Jones, H. M. Solar radiation pressure 

 effects, gas leakage rates, and air densities inferred from the orbit of Echo I. 

 In H. C. van de Hulst, 0. de Jager, and A. F. Moore, ed.. Space Research II, 

 pp. 339-351, North Holland Publishing Co., Amsterdam, 1961. 



The Special Reports of the Astrophysical Observatory distribute 

 catalogs of satellite observations, orbital data, and preliminary results 

 of data analysis prior to journal publication. Thirty-five numbers 

 (64 through 98), issued during the year, contain the following 

 material : 



Special Report No. 64, July 7, 1961. 



The revised orbit of Satellite 1958 Zeta, by R. G. Nigam. 

 Special Report No. 65, July 14, 1961. 



Atmospheric drag on non-spherical artificial satellites, by P. E. Zadunaisky. 

 Special Report No. 66 (C-22), July 17, 1961. 



Catalogue of satellite observations: Satellites 1958 Alpha (Explorer I), 

 1958 /31 (carrier rocket. Vanguard I), 1958 Epsilon (Explorer IV), 1959 

 al (Vanguard II), 1959 a2 (carrier rocket. Vanguard II), 1959 Eta 

 Vanguard III), and 1959 il (Explorer VII), for Sept. 1-Dec. 31, 19G0, by 

 D. V. Mechau. 

 Special Report No. 67 (C-23), July 17, 1961. 



Catalogue of satellite observations: Satellites 1960 il (Echo I), and 1960 

 t2 (carrier rocket. Echo I), for Sept. 1-Dec. 31, 1960, by D. V. Mechau. 

 Special Report No. 6S (C-24) , July 17, 1961. 



Catalogue of satellite observations: Satellites 1960 ;31 (carrier rocket. Tiros 

 I), for Sept. 14-21, 1960; 1980 /92 (Tiros I), for Sept. 2-Oct. 15, 1900; 

 1960 7l (carrier rocket, Transit IB), for July 7-27, 1960; 1960 72 (Transit 

 IB), for July 26-Nov. 7, 1960; 1960 vl (Transit 2A), for June 26-Dec. 29, 

 1960; 1960 7?2 (Greb), for June 22-Dec. 23, 1960; 1960 v3 (carrier rocket. 

 Transit 2A, Greb), for June 23-Dec. 31, 1960 ; 1960 a (Explorer VIII), for 

 Nov. 4-Dec. 30, 1960; 1960 |2 (carrier rocket, Explorer VIII), for Nov. 19- 

 Dec. 24, 1900 ; 1960 Omieron (Discoverer XVII), for Nov. 13-Dec. 31, 1960: 

 and 1960 Sigma (Discoverer XVIII), for Dec. S-31, 1960, by D. V. 

 Mechau. 

 Special Report No. 69, July 17, 1961. 



List of coordinates of stations engaged in the observation of artificial earth 

 satellites, by D. V. Mechau. 



