Geometry
Found in 58 Collections and/or Records:
Si conus scalenus ..., 24 August 1708
A discussion of cone sections.
Theorema..., 13 Feb. 1696
A theorem about the rapidity of descent into a cycloid curve.
Theorema, May 1708
Geometric and historical notes on Apollonius and some of his peers.
Theorema Cyclometricum, not later than 16 April 1708
Notes on cone sections, probably all connected to Gregory's joint project with Sir Edmund Halley to publish Apollonius and Serenus, two ancient geometers, following the success of the great Euclid project. Gregory was busy with his work overseeing the Scottish Mint, and he notes peevishly that the Dean of Christ Church is to "put upon" him particular resources in Apollonius.
Tractata et Dicta Huddenis Amsterodami, Maio 1693, 27 May 1693
Minute account of a day-long meeting with Jan Hudde in Amsterdam, covering things algebraic. Allusions to Gerardus Mercator's vindication about hyperbolics, and to foliate curves in general.
Trigonometria Plana, s.d.
A treatise on plane trigonometry in a hand other than Gregory's.
Two large geometry diagrams, s.d.
Two large folded printer's-proof diagrams in geometry, possibly for the Euclid book.
Varia positiones ... in prob: Pappi, c1703
Latin and English notes on Pappus, probably in connection with his book project on the ancient geometers.
The third side of this item is unrelated, a copy of an 1707 letter from Gregory, Christopher Wren, Isaac Newton, and others, to Danish astronomer Olav Roemer, concerning the Astronomiae, and accuracy of certain calculations and observations by Flamsteed and Tycho Brahe. The Tycho ms. is probably the 1627 Tabulae Rudolphinae, translated by Kepler.