Sounding Lead c. 1836 - 1860

johnericsson

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"Sounding Lead" is a nautical instrument used for measuring the depth of water, created by Swedish-American engineer John Ericsson around the mid-19th century. It features a weighted lead attached to a rope, with a graduated scale for determining depth. This particular example has a length of 93.5 cm and was crafted during a period of significant advancements in maritime technology. Ericsson is known for his work on the first ironclad warship, the USS Monitor, and his innovation is evident in this practical and functional object.