More evidence that the cosmic three‐degree blackbody radiation does not have a hump in its spectrum at about 1 mm has been reported by E. T. Byram, T. A. Chubb and Herbert Friedman of the Naval Research Laboratory [Science 169, 366 (1970)]. Measurements by James Houck, Kandiah Shivanandan and Martin Harwit (and subsequently by Dirk Muehlner and Rainer Weiss) had indicated a flux 50 times higher than expected from a 3‐K blackbody spectrum (PHYSICS TODAY, July 1970, page 56).

Topics
Blackbody, Thermodynamic states and processes, X-rays, Laboratories
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© 1970 American Institute of Physics.
1970
American Institute of Physics
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