WILLEBRORD SNELL (1591-1626) , commonly known as SNELLIUS, Dutch astronomer and mathematician, was
See also:born at
See also:Leiden in 1591 . In 1613 he succeeded his
See also:father Rudolph Snell (1546–1613) as
See also:professor of
See also:mathematics in the university of Leiden . In 1615 he planned and carried into practice a new method of finding the dimensions of the
See also:earth, by determining the distance of one point on its
See also:surface from the parallel of another, by means of a triangulation . His
See also:work Eratosthenes Batavus, published in 1617, describes the method and gives as the result of his operations between
See also:Alkmaar and
See also:Bergen-op-Zoom a degree of the meridian equal to 55,100 toises= 117,449 yds . (A later recalculation gave 57,033 toises =121,569 yds., after the application of some corrections to the
See also:measures indicated by himself.) Snell also distinguished himself as a mathematician, and discovered the
See also:law of refraction, 'in 1621 (see
See also:LIGHT) . He died at Leiden on the 3oth of
See also:October 1626 . In addition to the Eratosthenes Batavus he published Cyclometria sive de circuli dimen,.ione (1621), and Tiphys Batavus s . Histiodromice, de navium cursibus et re navali (1624) . He also edited Coeli et siderum in eo errantium observationes Hassiacae (1618), containing the astronomical observations of Landgrave
See also:William IV. of Hesse . A trigonometry (
See also:Doctrine triangulorum,) by him was published a
See also:year after his
See also:death .
JOHN SNELL (1629-1679)
SNIP SNAP SNOREM
Snell was born in 1580 rather than 1591. He was 46 at the time of his death on 30 October 1626, so that rather proves the point. ; )
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