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The Nuttall Encyclopedia
A physicist, born in Bristol; bred to the law, but entered the army, and went out to India, where, to the injury of his constitution, he was for seven years engaged on the trigonometrical survey of the country; devoted the rest of his life to scientific research; he contributed to the Philosophical Transactions , determined the length of the seconds pendulum at the latitude of London, and invented the floating collimator (1777-1835).
Wood, James, ed. Entry for 'Kater, Henry'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/k/kater-henry.html. Frederick Warne & Co Ltd. London. 1900.
the Week of Proper 13 / Ordinary 18