Janus: Greenwich Reduction Registers

RGO Archives/RGO 127 contains:
1	''Calculation of Earth's Tabular Place, by Carlini's Solar Tables, Milan Ephemeris 1833"
2	''Computation of North Polar Distances, from Quadrant Observations''
3	''Calculation of North Polar Distances from Circle Observations, by Index Errors: June 1812 to February 1820''
4	''Calculation of North Polar Distances from Circle Observations, by Zenith Points''
5	''Computation of Longitude and Ecliptic Polar Distance, from Right Ascension and North Polar Distance''
6	''Computation of Heliocentric Places'' of Planets
7	''Computation of Planet's Tabular Geocentric Place''
8	''Formulation of Normal Places and Geocentric Errors'' together with ''Formulation of Co-efficients of Normal Heliocentric Errors''
9	''Phenomena of Jupiter's Satellites: 1898 to 1909''
10-13	Star Ledgers

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Greenwich Reduction Registers

Title	''Formulation of Normal Places and Geocentric Errors'' together with ''Formulation of Co-efficients of Normal Heliocentric Errors''
Reference	RGO 127/8
Covering Dates	1835–1845 (dates inferred)
Extent and Medium	4 volumes; paper

Content and context

These volumes contain planetary observation reduction ''Form No. 19". Items /1a and /1b are two, largely of duplicated, volumes of material and represent the work of two different calculators (Breen and Dunkin respectively).

RGO Archives/RGO 127/8 contains:

Reduction ledger: [1750-1830]. The entries in this volume are labelled ''Progressive number 2-231''.
1 volume; paper.

1835–1845

Reduction ledger: [1750-1830]. The entries in this volume are labelled ''Progressive number 1-237''.
1 volume; paper.

1835–1845

Reduction ledger: August 1830 to November 1830. This volume is largely blank and only contains data on Uranus.
1 volume; paper.

1835–1845

Reduction ledger: 1896 to 1914.
1 volume; paper.

1835–1845