Showing Records: 1 - 10 of 11
Catalogue of book[s] now in Holland, May 1693
List of 17 titles (partial cites only) in Latin and French, in an unnamed repository, concerning history, classical literature, and philosophical commentary, such as the "Dictionaire Critique de M. Bail".
Excerpta de Codico M.S. Henratii communicata a [illegible], 27 May 1693
Extract of a volume (only partially cited) found by David Gregory in Amsterdam. He captions this "F: a. Schoten', suggesting that the work transcribed is that of geometer Frans van Schooten (1615-1660). The work concerns curves and quadratures, and is laced with comparisons to the work of Jan Hudde.
Folio C, c1680-c1708
Index Chartarum in M.S. C. in folio, 1700
An index, in Gregory's hand, to the material he designated as Folio C.
Memoranda et observata in Batavia 1693 Maio, 17 May 1693
Observata et dicta apud D. Hugenium, 06 June 1693
Notes of a conversation in Holland with Christian Huygens, concerning an 'horologium' to show hours, months, years, and planetary positions. More general mention of the work of numerous other scientists: Notably, Huygens disputes the notion of John Bernoulli (James Bernoulli's younger brother) that the curve of an inflated sail is part-catenary and part-circle, and warns that Newton ought not to be 'deflected' into theology or chemistry.
Observata et Dicta ... cum Huygeno Junio 1693, 30 June 1693
Remarks en passant about library volumes in history and physics seen in Leiden. A longer passage follows: notes to a conversation with Christiaan Huygens, critiquing Sir Isaac Newton's notions of absolute motion and the propagation of light. Huygens also says that John Flamsteed ought to declare for the absolute speed of light, and that this should persuade Jean Dominique Cassini.
Quarto A, c1680-c1708
Quo ad D.G. spectant in Pitcarnii Probl. de inventoribus, after August 1688
Scheda D.G. de rotatione globi de percussione orta, 12 February 1695
David Gregory's solution to Sir Edmund Halley's problem, proposed during Gregory's composition of the "Tract on Fluxions", of finding the rotary motion in a sphere struck by another sphere. (Halley's solution is in Coll-33/Quarto A [7].) It is built on some basic lemmas and includes a reference (possibly after the date given) to proposition 40 of the "Tract on Fluxions".