国立アメリカ歴史博物館のインスタグラム(amhistorymuseum) - 1月11日 22時39分

This is a tide predictor, designed in 1880. It's an in our Science and Math collection. ?

In 1872, the British physicist William Thomson (later Lord Kelvin) devised a machine to simulate mechanically the combination of periodic motions that produce tides. ➗

Inspired by this example, William Ferrel of the U.S. Coast and Geodetic Survey designed a tide predictor and had it built by the Washington, D.C., firm of Fauth and Company. This elegant machine was more compact than that of Thomson, and gave maxima and minima rather than a continuous curve as output. ?

It went into service in 1883 and remained in use until 1910. The success of Ferrel's tide predictor suggested the feasibility of replacing calculations performed by people with computation by machines. ⛵️ We predict you'll have a happy Hump Day, Instagram friends!
#MathHistory #Tidal #MaritimeHistory #Steampunk #TheTideIsHighButImHoldingOn @noaa

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