pl23_cgs02251.jpg
Description
Announcement of the opening of the San Juan Geophysical Observatory. This wasa new observatory as the C&GS; had operated an observatory in Puerto Ricosince 1903.
Credit
Family of Captain Miller J. Tonkel, NOAA Corps
Display Date
1965
Collection
Historic Coast & Geodetic Survey
Keywords
Coast and Geodetic Survey
Geophysics Geomagnetism