e/Colaba Observatory

Information
has gloss	eng: Colaba Observatory was an astronomical, timekeeping, geomagnetic and meteorological observatory located on the Island of Colaba, Mumbai (Bombay), India. History The Colaba Observatory located in Bombay was built in 1826 by the East India Company for astronomical observations and time-keeping, with a purpose to provide support to British and other shipping which used Bombay as a port. The 165 year old Building served as office space for the Indian Institute of Geomagnetism. Geomagnetism and meteorological measurements were started here in 1841 by Arthur Bedford Orlebar, who was then Professor of Astronomy at Bombay’s Elphinstone College. Magnetic measurements during the period 1841–mid 1845 were intermittent; following 1845 they became bi-hourly, then hourly. In 1845 Charles Brooke devised a self-recording photographic magnetometer with a light-source, a mirror for amplifying the magnet’s movement, and a drum of photographic paper. This system gradually replaced the older manual method of taking eye-observations through vertical microscope which scanned the ends of a magnetic needle; the magnetic needle itself was suspended by a bunch of silk fibers.
lexicalization	eng: Colaba Observatory
instance of	c/Astronomical observatories in India