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the Week of Proper 28 / Ordinary 33
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Bible Encyclopedias
Snellius

1911 Encyclopedia Britannica

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Dutch astronomer and mathematician, was born at Leiden in 1580. In 1613 he succeeded his father Rudolph Snell (1546-1613) as professor of mathematics in the university of Leiden. In 1615 he planned and carried into practice a new method of finding the dimensions of the earth, by determining the distance of one point on its surface from the parallel of another, by means of a triangulation. His work Eratosthenes Batavus, published in 1617, describes the method and gives as the result of his operations between Alkmaar and Bergen-opZoom 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 measures indicated by himself.) Snell also distinguished himself as a mathematician, and discovered the law of refraction, in 1621 (see Light). He died at Leiden on the 30th of October 1626.

In addition to the Eratosthenes Batavus he published Cyclometria sive de circuli dimen s 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 William IV. of Hesse. A trigonometry (Doctrina triangulorum,) by him was published a year after his death.

Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Snellius'. 1911 Encyclopedia Britanica. https://www.studylight.org/​encyclopedias/​eng/​bri/​s/snellius.html. 1910.
 
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