. comptesrendusheb1471908acad. es naturelles. Fig. 5 b. Terre. est au maximum. Ces courants telluriques se répartissent certainement sur tout le globe terrestre en donnant naissance à des perturbations magné- tiques Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original nce Periodicals; dicals.

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