SNELL (WILLEBRORD): Appolonius Batavus, seu Exsuscitata Apollonii Pergaei, Leyden, Excudebat Iohannes a Dorp, 1608, 4to; TIPHYS BATAVUS, sive Histiodromice, de navium vursibus et re navali, Leyden, ex officina Elzeviriana, 1624, 2 parts in one, 4to, FIRST EDITION, 2 full-page woodcut and one copper-engraved illustration (library label on outer margin of A1), two works in one vol., contemporary vellum (bowed). [II. Willems 224; Honeyman 2868]

Details

SNELL (WILLEBRORD): Appolonius Batavus, seu Exsuscitata Apollonii Pergaei, Leyden, Excudebat Iohannes a Dorp, 1608, 4to; TIPHYS BATAVUS, sive Histiodromice, de navium vursibus et re navali, Leyden, ex officina Elzeviriana, 1624, 2 parts in one, 4to, FIRST EDITION, 2 full-page woodcut and one copper-engraved illustration (library label on outer margin of A1), two works in one vol., contemporary vellum (bowed). [II. Willems 224; Honeyman 2868]

Lot Essay

Willebrord Snell (1581-1626) occupied the chair of mathematics at Leyden, his birthplace. He is still well known through his discovery in 1619 of the law of refraction in optics. In geodesy he laid down the principles for determining the length of an arc of a meridian, and in spherical trigonometry he discovered the properties of the polar or supplemental triangle.

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