| Description | Hourly meteorological observations made at the Royal Society's apartments at Somerset House, London, at the December (Winter) solstice. Columns for: hours of observation; barometer corrected flint glass; barometer corrected crown glass; attached thermometer; external thermometer; old standard barometer; attached thermometer; difference of wet and dry bulb thermometer; dew point; rain in inches; wind; with general remarks.
Headed: 'Meteorological Observations made at the Apartments of the Royal Society, Somerset-House, for Thirty-seven hours. Commencing 6. A.M. of the 21st Decr. 1842, and ending 6 P.M. of the following day. Greenwich mean time. By Mr. John D. Roberton, Assistant Secretary, Royal Society'. Inscribed verso: '1842 March - 42 hours. June 40 [hours] Decr. 37 [hours]'. With an alternative endorsement, signed by J D Roberton, struck through. |