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according appear arcs Atlantic atmosphere aurora borealis Berlin Berne Bologna Bonn Bossekop Bravais Breda Brussels cause Central Europe clouds coincidence colour conclusion countries crown currents direction distance disturbance Durham earth Edition electricity England Erfürt especially Europe exist fact Finally France Franecker frequency Geneva given Greenwich Hague height hypothesis Iena Illustrations indicated Italy July June Kendal known latitudes Leipzig less Lichtenberg light London luminous magnetic Manchester manifest Mannheim maximum mean mentioned meridian miles Moncalieri Montmorency movement Munster Neighbourhood night North observed Oxford Padua Paris Parma Peckeloh period phenomena phenomenon Plymouth polar aurora position Prague present probable produced Ratisbon rays regions relation remarkable Rome Sagan seems seen Sept sometimes sound Sparendam spectrum stations Stonyhurst summit taken terrestrial theory tion Utrecht variation whole winter Wittenberg zone Zurich
Página 5 - ... others, so low that they might be taken for the reflection of a distant burning homestead or city. This is what happened under Tiberius, when the cohorts hurried to the succour of the colony of Ostia, believing it to be on fire. During the greater part of the night the heaven appeared to be illuminated by a faint light resembling a thick smoke.