AT the request of the Dutch Geodetic Committee, the Minister of Marine has once more allowed Dr. Vening Meinesz to make pendulum observations on board a submarine of the Royal Navy, bound for Java, on the voyage from Helder to Alexandria.1 He left Helder on October 15 on board H.M. Submarine K XI, and arrived at Alexandria on November 12, after having touched at Sevilla and Tunis. On November 23 he embarked at Port Said on board the Dutch mail-steamer Koningin der Nederlanden and disembarked on December 5 at Amsterdam.
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MULLER, J. Dutch Pendulum Observations in a Submarine with a New Apparatus. Nature 117, 531–533 (1926). https://doi.org/10.1038/117531a0