Abstract
DETAILS concerning a natural bridge, formed by drifting materials, across the Nile below the Folar rapids (to which imperfect reference was made by Emil Ludwig in “Life Story of a River”) are given by E. J. Wayland. Dr. H. E. Hurst supplies further information concerning the way in which such bridges come into existence, and suggests that pilots of the Imperial Airways who pass near this particular one during their flights might be asked to collaborate by keeping notes of its change with time.
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Points from Foregoing Letters. Nature 139, 969 (1937). https://doi.org/10.1038/139969b0
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DOI: https://doi.org/10.1038/139969b0