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Hansen, Peter Andreas (1795-1874) astronomer Item
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Autograph letter signed to J.C. Adams

Introducing W. Hillhouse who is visiting England. On new method of calculation for special perturbations. Published by G.P.B.; subsequently published as original by Encke; reviewed as original by Hansen. G.P.B. not happy. Advantages of new method.

Bond, G P (fl 1852)

Autograph letter signed to J.C. Adams

Reply to J.C.A.'s of 29th. Comments on article in Mechanics Mag. Dec. 1846. Advises to wait for new observation of New Planet (Neptune) to measure its distance from sun, not to calculate. Thanks for further figures of position of planet. Does not favour Hansen's methods of calculation, nor LeVerrier's use of single observations. On the Lunar & planetary reductions calculated from Camb. Observatory

(See G.B.A. to J.C.A. 27 Mar.1851 for table of Saturn dated 1 Feb.1847).

Airy, Sir George Biddell (1801-1892) Knight, astronomer

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