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Excerpt from Reduction of the Observations of the Moon, Made at the Royal Observatory, Greenwich, From 1750 to 1830, Vol. 2: Computed by Order of the Lords Commissioners of the Treasury; Containing Investigation of Moon's North Polar Distance, Comparison of Moon's Observed and Tabular Place
Observed at Transit of Center. Correction applied for defective illumination, 4 °16. Increase of n.p.d. During passage of Semidiameter 82. This is not applied to form the numbers in the columns Geocentric N. P. D. Of Limb, Geocentric N. P. D. Of Center; which, therefore, in this instance, represent the N. P. D. Of Limb and Center. At Transit of Center. In Dr. Bradley's ms. Observations, the reading by Interior Divisions has been altered from 20 to to make it agree with the reading by Exterior Divisions; here, the unaltered reading by Interior Divisions is used.
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