| Description | Hourly observations made at Madras [Chennai] of the declination, horizontal force, and vertical force magnetometers, commencing from 10.00p.m. on 21 April [Gottingen Mean Time] and continuing to 9.00p.m. on 22 April 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'. Signed [p.3]: 'S.O.E. Ludlow Supt. Madras Magl. Obsy.'. |