Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Attention ESVA Patrons:

The Emilio Segrè Visual Archives’ site is moving soon and adopting an open access approach to digital image sharing. Once we have transitioned to the new site in 2021, we will no longer charge for our high-resolution digital images or usage fees (note that we do not hold copyright to all the images in our collections and you will still need to obtain permission for those which we do not own).

If you are working on a long-term project, we advise you to wait until the migration is complete so that you may obtain our copies for free. If you cannot wait, email us at nbl [at] aip.org and we will do what we can to assist you. We will not be offering refunds for past purchases.

For more information, please visit our FAQ page on the Ex Libris Universum blog. 

Bohr Niels H4

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Bohr Niels H4

Image title: 
Frisch Letter to Bohr
Credit line: 
Bohr Scientific Correspondence, courtesy AIP Emilio Segrè Visual Archives
Description: 

Page one of a letter written by Otto Frisch to Niels Bohr discussing nuclear fission experiments, January 22, 1939.

Photo date: 
1939
Original format: 
1 photographic print (black and white; 7.5 x 9 inches)
Person(s): 
Bohr, Niels, 1885-1962
Frisch, Otto Robert, 1904-
Category: