Unpublished observations, 'Experiments with an invariable pendulum, made at Parramatta' by [Thomas Brisbane] Table of observations taken with an invariable pendulum in Parramatta [New South Wales, Australia] from 24 September to 15 October 1824. A second copy of these observations is found at AP/11/5/10. A manuscript inscription across the top of the first page reads 'JFWH [John Frederick William Herschel] No 57' and next to this, in another hand, 'Recd from the Pres June 1 1825'. Subject: Geodesy Communicated by the President [Sir Humphry Davy]. Received by the Royal Society 1 June 1825. September-October 1824