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The determination of the length of the seconds pendulum  in different latitudes, is a subject, that has long been considered  of much interest and importance, but more especially  of late years, since the practical problem has received from  the ingenuity of Captain Henry Kater, certain improvements  and simplifications, which have rendered its results more  accurate than had ever before been obtained.

philosophical transactions of the royal society of london

1. Account of experiments made with an invariable pendulum at the Royal Observatory at Greenwich, and at Port Bowen, on the eastern side of Prince Regent's Inlet.