WE have received the eighteenth annual volume (for 1930) of the seismological records of the Observatory of De Bilt in Holland. The observatory is provided with a pair of horizontal seismographs and a ...
DR. C. DAVISON writes: “During the five years (1878-83) that Ewing spent in Japan, like other English teachers in Tokyo he was infected by the enthusiasm of Prof. John Milne, and became one of the ...
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