SECRETARY'S REPORT 91 



NoDviK, J. S. See Rustgi, Nodvik, and Weissler. 



PosEN, A. See McCrosky and Posen. 



RiGGS, F. B., Jb. Vacuum sealing of gold wire leads to a differential thermopile. 



Rev. Sci. Instr., vol. 32, No. 3, p. 366, March 1961. 

 Rustgi, O. P. ; Nodvik, J. S.- ; and Weissler, G. L. Optical constants of germa- 

 nium in the region 0-27 EV. Phys. Rev., vol. 122, p. 1131, 1961. 

 Strom, K. M. See Strom, S. E., and Strom, K. M. ; Strom, Strom, and Davis. 

 Stbom, S. E., and Strom, K. M. Interstellar absorption below 100 A. Publ. 



Astron. Soc. Pacific, vol. 73, pp. 43-45, 1961. 

 Stbom, S. E. ; Strom, K. M. ; and Davis, R. J. A general method of analysis for 



n-lens, m-mirror systems (abstract). Journ. Opt. Soc. Amer., vol. 72, p. 43, 



1961. 

 TiLLES, D. See Fireman, DeFelice, and Tilles. 

 TiLLES, D. ; DeFeuce, J. ; and Fireman, E. L. Argon-37 in recovered satellite 



material (abstract). Bull. Amer. Phys. Soc, ser. 2, vol. 2, No. 3, p. 277, 1961. 

 Weissler, G. L. See Rustgi, Nodvik, and Weissler. 

 Whipple, F. L. The dust cloud about the earth. Nature, vol. 189, No. 4789, 



pp. 127-128, Jan. 14, 1961. 

 . The earth's dust belt. Astronaut. Sci. Rev., vol. 3, No. 2, pp. 17-19, 



April-June 1961. 



. General conclusions. Mem. Soc. Roy. Sci. Li^ge, ser. 5, vol. 4, 1961. 



. Particulate contents of space. In Medical and Biological Aspects of 



the Energies of Space, P. Campbell, editor, 1961. 

 See also Jacchia and Whipple. 



Wright, F. W. See Hodge and Wright ; Hodge, Wright, and Hoffleit. 



The Special Reports of the Astrophysical Observatory distribute 

 catalogues of satellite observations, orbital data, and preliminary re- 

 sults of data analysis prior to journal publication. Numbers 45 

 through 63, issued during the year, contain the following material : 



Special Report No. 45, July 11, 1960. 

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

 satellites, by D. V. Mechau. 

 Special Report No. 46, July 11, 1960. 

 The effect of a variable scale height on determinations of atmospheric density 

 from satellite accelerations, by L. G. Jacchia. 

 Special Report No. 47 (C-15), Sept. 9, 1960. 

 Catalogue of satellite observations: Satellites 1958 Alpha, 1958 /31, 1958 y32, 

 1958 52, for Jan. 1-May 31, 1960, by D. V. Mechau. 

 Special Report No. 48 (C-16) , Sept. 9, 1960. 

 Catalogue of satellite observations : Satellites 1959 al and 1959 a2 for Jan. 1- 

 May 31, 1960, by D. V. Mechau. 

 Special Report No. 49 (C-17), Sept. 9, 1960. 

 Catalogue of satellite observations: Satellites 1959 Eta and i2 for Jan. 1- 

 May 31, 1960, by D. V. Mechau. 

 Special Report No. 50, Oct. 3, 1960. 

 The orbit of Satellite 1958 Alpha (Explorer I) during the first 10,500 revolu- 

 tions, by P. E. Zadunaisky. 

 Special Report (unnumbered), Dec. 20, 1960, 



Index to SAO Special Reports Nos. 1-50. 

 Special Report No. 51, Oct. 17, 1960. 

 Satellite orbital data : Satellites 1958 /91 and 1958 /32 by B. Miller ; Satellites 

 1958 62 and 1959 vl, by Y. Kozal, for Sept. 1959-April 1960, compiled by 

 D. V. Mechau. 



