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Hartmann lines

NUMBER of NEGATIVE Hartmann line     475

NUMBER of surveys                             3545

RATIO                                                13%
– (3) Hartmann lines: network of electrical origin, component of the terrestrial electric field, known as a more or less broadly oriented mesh, coming from nickel (each metal having a network). Discovered by Ernst Hartmann in 1954. The Crossing of negative Hartmann lines is highly pathogenic (Ernst Hartmann).