Long Keeping longkeeping.com · Reading room
Letter collection · 1673 · age 30

Extracts of Two Letters, the One of Mr. Newton, concerning the Number of Colors

by Isaac Newton

Kept from archive.org · 2 files · 781 KBCall number NEW LS1673.01

Provenance

Source
archive.org
Retrieved
1 October 2026
Source terms (summary)
Internet Archive item shows no rights statement
Rights
Public domainNewton's own text, as far as the record shows: its edition and notes name no translator or editor.Basis: author death year 1727, under a life-plus-70-years rule, as of 2026; other rules, such as the United States publication-date rules, are not assessed.
Formats
PDF scan, OCR text
Fingerprint
9a6aea832245b8b1dc7b4701919ceb641d705f379923a10aaf1ce2ad68c0bbd3sha256 of the file (64 characters). Any change to the file changes this code.
Cite as
Isaac Newton, Extracts of Two Letters, the One of Mr. Newton, concerning the Number of Colors (1673). Long Keeping, call number NEW LS1673.01. https://longkeeping.com/isaac-newton/extracts-of-two-letters-the-one-of-mr-newton-concerning-the/
Unchanged since collected At the last check, on 2 October 2026, all 903 originals, this work's 2 files among them, matched the fingerprints recorded when they were collected. Each copy is re-checked by hand once a year; there is no automatic alert yet.

Notes on this copy

  • #1The file carries images, and no check is recorded yet that none of them is a picture of the person (the collection keeps no likenesses).
  • #2Machine-read text (OCR), not proofread, with no page images in the file to check it against.
  • #10An Internet Archive derivative made from the scan, not the master scan.

Original

The main file is held, so this opens ia-philtrans-1673-two-letters-number-of-colours_djvu.txt, the first file that is served.

Open original OCR text, 12 KBPublic domain

Files

First pass, not a clearance.

FileFormatSizeSourcesha256Label
ia-philtrans-1673-two-letters-number-of-colours.pdfmain PDF scan 769 KB archive.org 9a6aea832245b8b1dc7b4701919ceb641d705f379923a10aaf1ce2ad68c0bbd3 Public domainNewton's own text, as far as the record shows: its edition and notes name no translator or editor.Basis: author death year 1727, under a life-plus-70-years rule, as of 2026; other rules, such as the United States publication-date rules, are not assessed.Held in the archive: its images await the archive's likeness review. Its source (another site)
ia-philtrans-1673-two-letters-number-of-colours_djvu.txt OCR text 12 KB archive.org 6bf5aef5abdf32f5ab1b4d2b23d31fda67f899098355cd1df575b67e4c517455 Public domainNewton's own text, as far as the record shows: its edition and notes name no translator or editor.Basis: author death year 1727, under a life-plus-70-years rule, as of 2026; other rules, such as the United States publication-date rules, are not assessed.From the Internet Archive (another site)