Transit circle tracking device, 20th century

Transit circle tracking device, 20th century

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Caption: Transit circle tracking device, 20th century. US astronomer Chester Burleigh Watts (1889-1971) with the experimental tracking device which later developed into the motor drive for the 6-inch transit circle. This instrument was mounted in the place of the old 5.3-inch transit instrument. Photographed at the US Naval Observatory, Washington DC, USA.

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Keywords: 1900s, 20th century, adult, american, astronomer, astronomical, astronomy, astrophysical, astrophysicist, astrophysics, black-and-white, caucasian, chester burleigh watts, circular, equipment, experimental, historical, history, invention, machine, male, man, measuring, monochrome, motor drive, north america, north american, observing, one person, people, person, research, researcher, researching, round, scientist, technological, technology, tracker, tracking device, transit circle, united states, us, us naval observatory, usa, washington dc

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