| Description | Hourly observations made at the Royal Observatory [Tarewali Kothi] at Lucknow, Uttar Pradesh, using the declination and horizontal force magnetometers. Commencing from 10.00a.m. on 2 July [Gottingen Mean Time] and continuing to 3.00p.m. on 5 July 1842.
Headed 'Abstract of observations of Magnetometers taken during a remarkable magnetic disturbance on the 2d, 3d, 4th & 5th of July 1842'. |