Letter · 1671 · age 28

A Letter of Mr. Isaac Newton ... containing his New Theory about Light and Colors

Kept from en.wikisource.org · 4 files · 2.0 MBCall number NEW L1671.01

Provenance

Source: en.wikisource.orgalso archive.org, www.newtonproject.ox.ac.uk
Retrieved: 1 October 2026
Source terms (summary): Wikisource: public domain worldwide, author died over 100 years ago
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.Files in this work carry different labels; each is listed below.
Formats: HTML, PDF scan, OCR text
Fingerprint: 6e0d29ff63dd3c316c6938856576c4bb18b5568f7b6183828fa46a9617834f57sha256 of the file (64 characters). Any change to the file changes this code.
Cite as: Isaac Newton, A Letter of Mr. Isaac Newton ... containing his New Theory about Light and Colors (1671). Long Keeping, call number NEW L1671.01. https://longkeeping.com/isaac-newton/a-letter-of-mr-isaac-newton-containing-his-new-theory-about/

Unchanged since collected At the last check, on 2 October 2026, all 903 originals, this work's 4 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.
#6The source's terms restrict reuse (a copyright notice, a non-commercial licence, research use only, or permission required). The work's source terms say why it is served or held.
#9Saved from Wikisource without a pinned revision number; the revision is recorded inside the file itself.
#10An Internet Archive derivative made from the scan, not the master scan.

Original

wikisource-en-new-theory-light-colours-1672.html

Open reading copy 119 KB Exact filePublic domain

Reading copy: the saved page with its pictures left out. A picture appears in the reading copy only once the library has recorded its licence, the licence is on the library's pass list, and it has been checked for a likeness. See its pictures at the source (another site). Exact file: the page byte for byte; its pictures do not load here.

Files

First pass, not a clearance.

Links inside these saved pages were written for the site they were saved from; some lead nowhere here.

File	Format	Size	Source	sha256	Label
wikisource-en-new-theory-light-colours-1672.html exact filemain	HTML	121 KB	en.wikisource.org	6e0d29ff63dd3c316c6938856576c4bb18b5568f7b6183828fa46a9617834f57	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.Licence: CC BY-SA 4.0 (another site). Attribution: Wikisource contributors (another site).This is Wikisource's licence for its own contributions to this saved page, such as layout and notes. The work's text is labelled public domain, as this file's label shows.
ia-philtrans-1671-2-new-theory-light-colours.pdf	PDF scan	1.8 MB	archive.org	c1996fbd0e5a3fc6a0451c9ec9cbeea24052e02c75c5ba581638da4ff70e9199	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-1671-2-new-theory-light-colours_djvu.txt	OCR text	33 KB	archive.org	911e1cf729de3f9c65467ba90ca14ec09c51c4c9f39239a7860f3c30e1f4861d	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)
NATP00006.html	HTML	54 KB	www.newtonproject.ox.ac.uk	586829028e393da9f59b845cb9ab8241d1ae0fe11dc3e278b022580c2116e70c	Likely in copyrightModern Newton Project transcription with a current copyright notice; Newton's own words are public domain.Basis: added material: modern diplomatic transcription, '(c) 2026 The Newton Project'.Held in the archive: likely in copyright. Its source (another site)