left to right: Nicholas Hunter Heck (1882-1953) and Frank Neumann (1892-1964) of the U.S. Coast and Geodetic Survey. Caption to this photograph: "Locating a world shaking earthquake from seismological records collected by Science Service. N. H. Heck (left) and Frank Neumann of the U.S. Coast and Geodetic Survey are locating the epicenter of the quake on a large globe."
No access restrictions Many of SIA's holdings are located off-site, and advance notice is recommended to consult a collection. Please email the SIA Reference Team at osiaref@si.edu