Page 370 - 89 history of astronomy_opt

for giving the clock error. In 1816 a new
transit instrument, by Troughton, was added,
and from this date the Greenwich star places
have maintained the very highest accuracy.
George Biddell Airy, Seventh Astronomer
Royal,[4] commenced his Greenwich labours
in 1835. His first and greatest reformation
in the work of the observatory was one he
had already established at Cambridge, and
370