Brown, R. Hanbury, and Hazard, C. (to be published). Holmberg, E., Medd. Lunds. Astro. Obs., Series 2, No. 136 (1957). Mills, B. Y., Aust. J. Phys., 8, 368 (1955).
THE existence of a source in the Crab Nebula with an angular diameter of less than 1 sec of arc has been revealed by observations of interplanetary scintillation at a frequency of 38 Mc/s (ref. 1).
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