| Description | Hourly observations made at Trivandrum [Thiruvananthapuram], Kerala, of the declination, horizontal force, and vertical force magnetometers, commencing from 10.00p.m. on 29 May [Gottingen Mean Time] and continuing to 9.00p.m. on 30 May 1841. With readings of the barometer and attached thermometer, and dry and wet bulb thermometer over the same period. There are general remarks on the state of the weather, and a column for electrometer readings [which has been left blank].
Headed 'Abstract of Term-day Observations'. With an extended memorandum [p.4] from John Caldecott, 31 May 1841, to the Royal Society, commencing: 'The instruments only reached the observatory in the middle of last month; they have been rather hastily brought into use...'. |