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Excerpta et notanda in Kepleri ... ad vitellionem, c1693
Item
Identifier: Coll-33/Quarto A [38.1]
Scope and Contents
A discussion, probably inspired by Sir Isaac Newton, of whether it was Willebrord Snell or Voss who discovered a law of refraction first, from which Rene Descartes arguably derived his version at last.
Dates:
c1693
Queries to My Lord Tarbat from Mr Lloyd of Oxon, after 1690
Item
Identifier: Coll-33/Quarto A [38.2]
Scope and Contents
An Oxford colleague's list of questions about resources for Irish studies in Scotland, probably for remanding by Gregory to his old ally in the Edinburgh Visitation troubles, "My Lord Tarbat", who was George Mackenzie, Viscount Tarbat, first Earl of Cromarty.
Dates:
after 1690