History of Science, Mathematics & Technology: Primary Sources: Physical Sciences

This site explores the complex history surrounding the invention of the atomic bomb.

A comprehensive collection of nearly 10,000 letters to and from Talbot, the Wiltshire polymath best known for his invention of photography.

The Einstein Archives Online Website allows viewing and browsing of approx. 3,000 high-quality digitized images of Einstein’s writings and scientific and non-scientific manuscripts.

Search through a collection of more than 30,000 historical images of scientists and their work.

Epact is an electronic catalogue of medieval and renaissance scientific instruments from four European museums, and consists of 520 catalogue entries and a variety of supporting material.

A collection of the scientific works of Isaac Newton including a selection of Newton's manuscripts, concentrating on his mathematical work in the 1660s.

A collection of many seminal papers from the history of chemistry from the 18th to early 20th Century.

Included are images relate to Caltech but also to the history of science in general, and they represent people, places, fine art, rare book illustrations, and historic instruments.

A website dedicated to making his unpublished and published works freely available online offers numerous images, documents, and other online resources

Find records of the other scientists and scientific institutions of Galileo's time, as well as information about Galileo's astronomical observations and instruments.

The Macclesfield Collection documents Sir Isaac Newton's writings and ideas, in letters and manuscripts, on gravitation, calculus, the Principia mathematica, optics, chemistry, comets and other subjects. It consists primarily of holograph letters to and from 17th and 18th century scientists.