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Oct 17, 2017 at 3:13 history edited Alexandre Eremenko CC BY-SA 3.0
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Apr 15, 2017 at 13:06 history edited Alexandre Eremenko CC BY-SA 3.0
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Dec 20, 2014 at 19:53 comment added Mauro ALLEGRANZA It can be interesting to note that one of the "possible inventors" of prostapheris, the german astronomer Paul Wittich, collaborator of Tycho Brahe, was teacher in Frankfurt during 1576 of the scottish physicians and astronomer John Craig which in turn was linked with John Napier.
Dec 10, 2014 at 16:35 history edited HDE 226868 CC BY-SA 3.0
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Dec 10, 2014 at 15:12 history answered Alexandre Eremenko CC BY-SA 3.0