. Determinations of gravity. Gravity; Pendulum. PENDULUM OBSERVATIONS. IT was early decided by Captain Scott, on the advice of the late Professor Helniert of the Central Bureau fur Erdmessiing, that further pendulum observations should be made in continuation of the work in the Antarctic by L. Bernacchi, of Captain Scott's former ' Discovery " Expedition, and of Professor von Drygalski, the leader of the German Expedition of 1901. By the kindness of the late Professor Helmert, the loan was offered of the necessary apparatus from the Potsdam Geodetic Institute. Early in June, 1910, therefo
. Determinations of gravity. Gravity; Pendulum. PENDULUM OBSERVATIONS. IT was early decided by Captain Scott, on the advice of the late Professor Helniert of the Central Bureau fur Erdmessiing, that further pendulum observations should be made in continuation of the work in the Antarctic by L. Bernacchi, of Captain Scott's former ' Discovery " Expedition, and of Professor von Drygalski, the leader of the German Expedition of 1901. By the kindness of the late Professor Helmert, the loan was offered of the necessary apparatus from the Potsdam Geodetic Institute. Early in June, 1910, therefore, I proceeded to Potsdam in order to gain experience in the use of the instruments under the able tuition of Professor L. Haasemann. Thanks, again, to the efforts of the late Professor Helmert and Professor Haasemann, who had already standardized the apparatus and found its constants, I was able to complete the necessary observations and return with the apparatus in time to catch the " Terra Nova " at Cardiff. On the journey to Cardiff, the apparatus was treated with the greatest care, since any serious variations in length of the pendulums (due, for instance, to sudden shocks), would be almost fatal to accurate work. The pendulums are peculiarly liable to such shocks when travelling by rail and, wherever possible, it was customary to travel by boat in order to avoid these disturbances. After leaving Cardiff, no rail journey of more than about 6 miles length was undertaken until the pendulums had completed their work in the South. On the return, however, it was found necessary to bring the apparatus across Canada via the Canadian Pacific Railway, but, thanks largely to the kindness of their officials in Vancouver and elsewhere, all the pendulums accomplished the journey without mishap. The list of those, exclusive of Captain Scott, Dr. Simpson and other members of the Expedition, to whom I am indebted for valuable help and assistance, is indeed a long one. First and
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