| Description | Hourly observations of the horizontal force and vertical force magnetometers at the Colaba Obsrevatory, arranged by day. The horizontal force magnetometer readings have columns for Gottingen mean time, observation, middle doubled, sum, mean, temperature, observer's initial and general remarks. The vertical force magnetometer readings have columns for Gottingen mean time, Bombay [Mumbai] mean time, observed reading, correction, correct reading, a+a/2, thermometer, observer's initial, and general remarks. There are declination magnetometer readings for 10 November [p.34], 27 November [p.96] and 29-30 November [p.100, p.104 and p.108]. |