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Subject Source: Library of Congress Subject Headings

Found in 12 Collections and/or Records:

Apud Doctorem Ruyschium Amsterodami, 24 May 1693

Identifier: Coll-33/Quarto A [10]
Scope and Contents Notes from a paediatric anatomy demonstration, that appears to have dealt with certain birth defects. Followed by what appears to be a note about an actuarial problem concerning human senescence; several individuals who have worked on it are named, including Christiaan Huygens. Then follows a diagram of a machine designed by Jan Hudde for descrying a curve of changing slope. Last is a note about a conversation with Hudde about calculating dimensions and focal length of lenses in apertures.
Dates: 24 May 1693

De affirmanda parallaxi magni orbis, cogitatum Hugenii, June 1693

Identifier: Coll-33/Quarto A [15]
Scope and Contents A transcription of Christiaan Huygen's argument that because stars' observed radii are so insensibly small, the diameter of the earth's orbit relative to the stars' position is also insensible, and thus the parallax measurement, which ought to prove or disprove the Copernican layout of the heavens, is useless.
Dates: June 1693

Epist ad D. Hugenium..., 10 September 1693

Identifier: Coll-33/Folio C [180]
Scope and Contents Draft of a letter to Christiaan Huygens, in which Gregory follows up on his promise in Holland to send along his 'second method' of quadrature in detail.
Dates: 10 September 1693

Folio C, c1680-c1708

 Series — Volume Dc.1.61: Series Coll-33/Folio C
Identifier: Coll-33/Folio C
Scope and Contents The papers of David Gregory consist of: These are mostly handwritten items, bound together as a volume, though with some loose insertions of manuscripts which had strayed, some of them with modern annotations concerning their provenance. Their scope and content is as David Gregory indexed them, save for the missing items, which consist of two dozen papers and letters on general physics and maths, and several...
Dates: c1680-c1708

Index Chartarum in M.S. C. in folio, 1700

Identifier: Coll-33/Folio C [index]
Scope and Contents An index, in Gregory's hand, to the material he designated as Folio C.
Dates: 1700

Memoranda et observata in Batavia 1693 Maio, 17 May 1693

Identifier: Coll-33/Quarto A [31]
Scope and Contents Batavia is a seventeenth-century cognomen for the Netherlands, to which David Gregory went in the spring of 1693, mostly to talk science with Christiaan Huygens. This document is a list of some books he wished to buy for himself and for friends back home, if he could find them. They covered Palladius, Thucydides, Dionysius of Halicarnassus, Erasmus, "all I can find of the Roman Authors at Amst[erdam]", and others. On the reverse is a list of topics he wished to discuss when he finally sat down...
Dates: 17 May 1693

Observata et dicta apud D. Hugenium, 06 June 1693

Identifier: Coll-33/Quarto A [4]
Scope and Contents 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.
Dates: 06 June 1693

Oratio de Quadr: Lunale Hypocratis, 1690

Identifier: Coll-33/Folio C [190]
Scope and Contents Graduation speech, in Gregory's hand, of one Laurence Oliphant. This young man may have been Gregory's future brother-in-law.

The subject is Hyppocrates' lunula. Two documents on the same subject come before this, no doubt as supporting notes. One is the draft of a letter from Gregory to Wallis, referring to a 1687 article by Tchirnhausen in the Leipzig Acta, the other, a transcript of that article.
Dates: 1690

Problema Alhazeni, c1690

Identifier: Coll-33/Folio C [24]
Scope and Contents Huygens's treatment of a problem by Alhazen, which appears to have been copied out at the same time as item 23 before.
Dates: c1690

Propositiones Quaedam de Ludo Aleae ..., s.d.

Identifier: Coll-33/Folio C [22]
Scope and Contents Propositions from Huygens on dicing and games of chance generally. (He may mean 'tessella' where he refers to 'tessera', or perhaps he refers to dominoes.)
Dates: s.d.