SECRETARY’S REPORT 103 
in some cases. The determination of the phototime expressed in 
terms of atomic time is now in progress. 
For a program involving the measurement of the earth’s albedo, 
observations have been made of the brightness of the earthshine on 
the dark part of the moon’s crescent disk. These data will make it 
possible to evaluate the percent of clear and of cloudy parts of the 
atmosphere which contribute to earthshine. 
Under the supervision of Charles A. Peterson, the Communications 
Center’s activity has increased proportionately with the number of 
objects launched. An average of 539,057 words per month is cleared 
through the center; most of these words (groups of five numerals or 
letters) represent satellite information received or sent throughout 
the world. 
PUBLICATIONS 
Numbers 1 to 5 of volume 3, Smithsonian Contributions to Astro- 
physics, were published during the year. The following papers by 
staff members of the Astrophysical Observatory appeared in various 
journals: 
Davis, R. J.. McCrosky, R. E., WHIppLzE, F. L., and WuitTney, C. A. A plan for 
operating an astronomical telescope in an earth satellite. Astron. Journ., 
vol. 64, p. 50, 1959. 
Davis, R. J.. WuHIpPeie, EF. L., and Wuirney, C. A. An astronomical telescope in 
space. Astronaut. Sci. Rev., vol. 1, p. 9 et seq., 1959. 
Fireman, H. L. The distribution of helium-3 in the Grant meteorite and a de- 
termination of the original mass. Planetary and Space Sci., vol. 1, pp. 66-70, 
1959. 
FIREMAN, HE. L., and Dr Ferice, J. Argon-39 and tritium in meteorites. Astron. 
Journ., vol. 64, p. 127, 1959. 
Hawkins, G. S., and Wurpiez, FF. L. The width of meteor trails. Astron. 
Journ., vol. 63, pp. 283-291, 1958. 
HenizE, K. G. A new planetary nebula NGC 6164-65 (Cederblad 135a, b). 
Astron. Journ., vol. 64, pp. 51-52, 1959. 
Hywnek, J. A., Henizz, K. G., and Wurppre, F. L. Report on the precision opti- 
eal tracking program for artificial earth satellites. Astron. Journ., vol. 64, 
p. 52, 1959. 
Jaccutia, L. G. The final moments of Sputnik II. Sky and Telescope, vol. 17, pp. 
561-562, 1958. 
Two atmospheric effects in the orbital acceleration of artificial satel- 
lites. Nature, vol. 188, pp. 526-527, 1959. 
Corpuscular radiation and the acceleration of artificial satellites. Na- 
ture, vol. 183, p. 1662, 1959. 
Krook, M. Structure of stellar atmospheres II. Astrophys. Journ., vol. 129, 
pp. 724-733, 1959. 
Structure of shock fronts in ionized gases. Ann. Phys., vol. 6, pp. 188- 
207, 1959. 
Kroox, M., and Precxer, J. C. Sur le calcul de modéles d’atmosphére en 
équilibre radiatif (cas non-gris). Comptes Rendus Acad. Sci. Paris, vol. 
247, pp. 1177-1179, 1958. 
536608—60——_8 
