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  "text": "Mean Variation of the Magnetic Needle.\n\nJune 1821, $^{\\circ} 24' 11'' 18$\n1822, $^{\\circ} 24' 9'' 55$\n1823, $^{\\circ} 24' 9'' 48$\n\nCorrections.\n\nPart I., p. 145, l. 9, and p. 148, l. 12, for decipimenta, read dissepimenta.",
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