Main, Robert, Astronom (1808-1878). 7 eigenh. Briefe mit U.

London und Oxford, 1859 bis 1871.

Zusammen 7½ SS. auf 14 Bll.

 500.00

An den Astronomen Wilhelm Förster: "In the 'Astronomische Nachrichten' No. 1157 is an ephemeris of Nysa computed by you, which unfortunately does not give the distances of the planet from the earth. As it is probable that you have these distances in your manuscript, the Astronomer Royal would be much obliged by your having the goodness to furnish him with them from 1858, Sept. 13 to October 2, for the purpose of computing the parallaxes in the reduction of some observations made at Greenwich [...]" (7. VI. 1859).

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