IN the obituary notice of M. Radau printed in the “Notes” columns of NATURE (January 11, p. 354) I notice the statement: “At no time does he seem to have held an official post as a practical astronomer”. These words fail to do complete justice to this distinguished man of science. On M. Loewy's death M. Radau was appointed to succeed him as “le Membre du Bureau des Longitudes charg de la rdaction de la Connaissance des Temps”, and in this capacity he signed the “avertissements” to the volumes of the Connaissance des Temps for the years 1911, 1912, and 1913 as the official responsible for their contents.
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