Magnetic observations of declination made at Colaba Observatory, Bombay [Mumbai], India Hourly observations of the declination magnetometer at the Colaba Observatory, arranged by day. Columns for Gottingen mean time, observed reading, middle doubled, sum, mean, observer's initial and general remarks [largely blank]. The front cover [p.1] is headed; 'Declination Force February 1842' and is isncribed twice 'Profr. Orlebar' [Arthur Bedford Orlebar] 1-26 February 1842