Dredging New York harbour. The steamboat at left is using an apparatus suspended below it to survey the harbour floor and take soundings to determine

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Dredging New York harbour. The steamboat at left is using an apparatus suspended below it to survey the harbour floor and take soundings to determine which areas need dredging. Artwork from the ninth volume (first period of 1892) of the French popular science weekly 'La Science Illustree'.

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Size: 5575px × 3803px
Photo credit: © Science Photo Library / Alamy / Afripics
License: Licensed
Model Released: No

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