Sir Thomas Brisbane Research Articles

XXII. An account of experiments made with an invariable pendulum at New South Wales, by Major-General Sir Thomas Brisbane, K. C. B. F. R. S. Communicated by Captain Henry Kater, F. R. S. in a letter to Sir Humphry Davy, Bart. Pres. R. S

Sir, In compliance with the request of Major General Sir Thomas Brisbane, I have the honour to lay before the Royal Society the results which I have deduced from his experiments, made with an invariable pendulum at London and at Paramatta. The pendulum employed belongs to the Board of Lon­gitude, and is of the same construction as that which I used at certain stations of the Trigonometrical Survey of Great Britain. Before Sir Thomas Brisbane's departure, I observed the following series of coincidences at Mr. Browne's house in Portland Place, London, in order to determine the number of vibrations made by this pendulum in twenty-four hours.