The Foucault Pendulum in the main rotunda at Griffith Observatory. The pendulum demonstrates the rotation of the earth. Above can be seen the murals of Hugo Ballin. The observatory was built in 1935. Architects: John C. Austin and Frederick M. Ashley.
Griffith Observatory Observatories--California--Los Angeles Austin, John C. W.(John Corneby Wilson),1870-1963 Ashley, Frederick M Griffith Park (Los Angeles, Calif.)
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