Greenwich Observations in Astronomy and Magnetism Made at the Royal Observatory, Greenwich, the Royal Greenwich Observatory, Herstmonceux and the Royal Greenwich Observatory, Abinger in the Year ...
H.M. Stationery Office, 1921 - Astronomy
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Instrumental Corrections and Cloc kError
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9 JJ Angle from Sun's Area Corrected Mean Area of Area Area of UMBRA Area of WHOLE Areas of Sun Central Meridian Centre in terms Corrected Mean Longitude Day and Hour December 28 Dew Point Distance from Centre Faculae on Photographs—continued Greenwich Civil Groups only seen Heliographic Heliographic Spots irregular stream JJ JJ JJ July July 25 July 9 June June 24 large regular spot Letter for Groups Longitude of Group Magnetic Mean Latitude Longi Measures of Positions Nautical Almanac Number O-IO O-OI Observation Polaris S.P Position Angle Positions and Areas Projected Area Right Ascensions Rotation and Letter seen once Sept shortening of Mean small spots small unstable spots Spot Group Spot or Spot Spots and Faculae Sun Spots Sun's Axis Sun's Radius terms of Sun's tude from Central Wave in Dec Wave in N.F. Whole Spot