. BLUE SCALE OF NAUTICAL MILES. 50 100 150 200 t Charts showing the recent extension of the South Georgia whaling grounds limits of whaling area during seasons 1923-4 to 1926-7 „ „ „ „ .. 1927-8 to 1930-1 main concentration (300 contour) during seasons 1923-4 to 1926-7 „ „ (150 contour) „ „ 1927-8 to 1930-1

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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti