| Description | Table of horizontal force magnetometer readings taken at two minute intervals from 9.41a.m. on 5 April to 7.30p.m. [Singapore mean time] on 6 April 1843, a period of magnetic disturbance. Columns for date, Singapore and Gottingen mean time, mean reading of instrument, difference between mean reading and diference in terms of the whole force, with general remarks.
Headed [p.1]: 'Extraordinary observations taken on the 5th & 6th April 1843'. Signed [p.2] by Charles Elliot. Inscribed [p.4]: 'Abstract of Extraordinary observations'. |