Galitzin Vertical Component Seismometer and McComb-Romberg
tilt compensation seismograph in: Coming to grips with the
Earthquake Problem," by Nicholas H. Heck, 1931. Journal of the Franklin
Institute, Vol. 212, No. 3, pp. 269-303.
Image ID: cgs00093, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1930 ca.
Category: Geophysics Seismology/
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
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November 10, 2017