Shelby White and Leon Levy Archives Center, Institute for Advanced Study, Princeton, NJ, USA
Photograph collection - Einstein-- EB Series-barn collection\21-EB PHOTOS-A.E. other (1 of 1)
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This meridian circle (also called: transit-circle or transit telescope), which is an astronomical instrument used for taking measurements relating to stars, was built for Brazil's Observatório Nacional at the end of the nineteenth century by the celebrated French maker of scientific instruments, Paul Gautier.