Cross-stall. Artwork of a cross-staff being used to measure the elevation of the Sun. Image from Mariner's Magazine (1669). Image from \Mariners Magaz

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Cross-stall. Artwork of a cross-staff being used to measure the elevation of the Sun. Image from Mariner's Magazine (1669). Image from \Mariners Magazine\" Samuel Sturmy (1669)."

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Size: 3803px × 4695px
Photo credit: © ROYAL ASTRONOMICAL SOCIETY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 17th, angle, artwork, astronomical, astronomy, black--white, century, cross, elevation, equipment, historical, history, illustration, instrument, jacobs, measuring, monochrome, navigation, staff, sun