Ladd Observatory

The Ladd Observatory is an astronomical observatory of Brown University in Providence, Rhode Island, USA. The observatory was dedicated in 1891 and is named for benefactor Herbert W. Ladd.

The main telescope is a 12 inches (30 cm) refractor with a lens made by John Brashear following the design of Charles S. Hastings. The equatorial mount and mechanical clock drive were made by George N. Saegmuller.

Besides astronomical research, Ladd sent out a time signal for decades. When they decided to stop the service in the 1970s, they discovered that nobody was currently receiving it.

The building was added to the National Register of Historic Places in 2000.


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