Image: Museum Boerhaave - Snellius quadrant
Description: Museum Boerhaave, Leiden - Quadrant was manfuctured to order by the cartographer Willem Janszoon Blaeu for the Leiden professor Willem Snel van Rooyen, better known as Snellius (1580 -1626)
Title: Museum Boerhaave - Snellius quadrant
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Author: Prof. Jos van den Broek
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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