Abstract
THE earth is a great laboratory in which Nature is constantly performing physical experiments. The student of earth physics labours under the disadvantage that systematic and trustworthy data are available for little more than a century. This period is too limited from which to draw many significant conclusions regarding the complex world-wide and cosmical causes and interrelationsinvolved. In the collection of geophysical data, chief attention must be given to geographical and space-distribution and to variability with time characterizing the phenomena concerned. These data must include not only isolated observations on land and sea but also continuous observations at fixed observatories to follow simultaneous variations with time and co-ordination with experiment in the physical laboratories and astrophysical observatories.
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FLEMING, J. Geomagnetic Research in the Americas. Nature 146, 273–274 (1940). https://doi.org/10.1038/146273a0
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DOI: https://doi.org/10.1038/146273a0