Notebook of magnetic observations made at Colaba Observatory, Bombay [Mumbai], India, by [Arthur Bedford Orlebar?] Commencing with dip needle [?] observations at the Bombay Observatory, recording the temperature, number of vibrations 1-300, arc, time and declination [?]. The notebook also contains observations from alternative locations, including Malabar, Nagano and Alibag. Headed [p.1]: 'Kanstein's apparatus'. There are pencilled calculations on the back cover [p.32]. 14 April 1841-20 January 1842