1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
TABLE II. — Diurnal Variation Potential Gradient. Station. Karasjok. Sodankyla. Kew (19, 12). Greenwich. Florence. Perpignan. Lisbon. Tokyo. Batavia. Cape Horn(20). Period. 1903-41882-83. 18621864. 18981904. 1893-96. 1883-85. 1886-88. 1884-86. 1897-98. 1900-1. 18871890. 18901895. 1882-83. Days. All. All. Quiet. All. All. Fine. All. All. Dry. Dry. Pos. h 5-5 3-o 3-5 3-35 3-o 8-4 3-o '•7 7-8 3-5 2'5
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- Vol. 2, pp. 862-862