Dew point observations from the Colaba Observatory, Bombay [Mumbai], India Collected data on dew points, commencing with 'Mean monthly temperature of the dew point at Bombay [Mumbai], during 1854 by the different methods of observations and calculations...' [p.1]. Followed by a 'Table showing the monthly difference of dew point at Bombay by the different methods of calculatio and observation...' [p.3]. The main tables in this group [pp.5-28] are headed 'Experimental Observations on the Dew Point...', and show daily readings of instruments arranged in monthly tablles. Columns for Bombay civil time, dew point by Ronulds [Regnault's hygrometer], by Daniel [Daniell's hygrometer], dew point computed by Glaisher's fromula, by Apjohn's formula; standard barometer uncorrected, standard air themometer and standard wet bulb thermometer. With means. Inscribed [p.28]: 'Experimental Dew Point Observations with Results made at the Govt. Observatory Bombay. 1854'. 19 January-31 December 1854