II. MAGNETIC disturbances are closely connected with the Auiroræ; while in temperate zones they are the exception, they form the rule in Arctic regions, at least the instruments are almost in constant ...

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Map: Eurasian reed warbler breeding range (green) in Europe and variation in the geomagnetic signature (total magnetic intensity, magnetic inclination and magnetic declination). The natural migratory ...

AN account of a minute magnetic survey of a small district in Baden, adjacent to the Rhine, where there is considerable local magnetic disturbance, has been received from the author.1 Observations of ...