Isaac Newton 1686 · Cambridge
Study into the night
23:00–02:30 · Estimated
Estimated by typical tue. 23:00 is an assumed start; 02:30 represents the usual bedtime range.Source timing: Usually not in bed before 02:00–03:00; occasionally 05:00–06:00.
“till 2 or 3”
Short verbatim excerpt · Humphrey Newton
Open the original for the surrounding passage.
Two letters to John Conduitt
January and February 1727/8 · The Newton Project
Keynes Ms. 135, King’s College, Cambridge · normalized transcription
Passage: First letter, p. 2
Timing & context
Bedtime could be later. Seasonal laboratory vigils are not plotted as everyday work.
Humphrey recalled about five years of service. His account gives habits rather than a timetable; occasional garden walks remain labelled as such.
1686 represents the 1680s period when Humphrey Newton assisted him; it is not the date of a recorded day.
Manuscript catalogue · The Newton Project ↗