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Description
A median section through the earth showing composition of the interior andtransmission of earthquake waves. In: Earthquakes and Astronomy by N. H.Heck. Published in: The Sky, March 1937. P. 14. (Image credit: Collected Papers of Captain Nicholas Heck, NOAA Central Library)
Credit
Collected Papers of Captain Nicholas Heck, NOAA Central Library
Display Date
1937
Collection
Historic Coast & Geodetic Survey
Keywords
Coast and Geodetic Survey
Geophysics Seismology