The Magnetic Variation in the Neigh Bourhood of the North Pole

This district begins at the south-west end of the Makwexgana spillway between the Chobe and the Okovango, which has not been flooded since 1910. It must be about dead level, since when it does flood, the Chobe and Okovango flood waters respectively meet halfway. The only Europeans who have traversed it, to my knowledge, are Major St. Hill Gibbons in 1898, when on his way from the Chobe he turned back halfway, meeting there the rising flood water from the Okovango ; Franz Seiner in September 1905 ; and a colleague of mine, Capt. G. B. Moseley, who traversed it on foot with carriers in November 1913, from Diei, on the Chobe, to Kabamokoni and back. No native in Ngamiland appears to be quite immune from malaria. The Batawana, although less affected than the European, suffer more from it than the Makuba. But even the Makuba during the fever season frequently get malarial headaches and a rise of temperature. If, however, the process of desiccation of this country continues in the ever steadily progressing manner that it has done during the last hundred years, then at no very distant time it will be as free from malaria as the Kalahari is to-day, but then it will also be a thirstland

Physics · Variation (astronomy · Geological and Geophysical Studies