Cambridge University has digitized much of its collection of original Newton papers.
A digital library of images in the areas of art, architecture, the humanities, and social sciences, with a set of tools to view, present, and manage images.
Artstor is now available in its new home on JSTOR! When you search JSTOR, you will find Artstor’s 2+ million licensed images and more than 1,700 additional primary source collections alongside JSTOR’s vast collection of books, journal articles, and research reports.
Newspaper and magazine articles can be especially rich primary source materials when you are researching the transmission of or popularization of an idea in the nineteenth and twentieth centuries.
When searching Primo, you can use specific Library of Congress subheadings to identify potential primary source materials:
[subject] -- Early works to 1800
Alchemy -- Early works to 1800
[subject] -- Popular works
Quantum theory -- Popular works
[subject] -- in [different domain]
[subject] and [subject]