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. 

Gunn Ross F1

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Gunn Ross F1

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We charge a usage fee per photo if the photo is published, reproduced in a product or publicly exhibited. This is not a license in the legal sense. As a non-profit institution, we do not make any money providing these photographs. It is only by assessing usage fees that we are able to cover the cost of providing publication quality copies of our photos, preserving the photograph collection according to archival standards, and providing access to the collection by maintaining an online image database. The copyright holder may charge a fee in addition to our service fee.

Images are for use in educational projects only and must be used in a respectful manner.

$20.00
Image title: 
Gunn's Research at Weather Bureau
Credit line: 
AIP Emilio Segrè Visual Archives
Description: 

A 3,000 cubic meter cloud chamber for Weather Bureau research. The object is to bring cloud and weather processes into the laboratory where quantitative control of conditions can be maintained. Used in a number of investigations on precipitation mechanics. Compressor and washer in background. Airlock and 20 inch access pipe and valve in left foreground. Small laboratory underground. Droplet growth and evaporation studies can be made by dropping droplets of controlled size from top to bottom and measuring the change in falling velocity by electronic means.

Photo date: 
February 6, 1962
Original format: 
1 photographic print (black and white; 8 x 10 inches)
Person(s): 
Gunn, Ross, 1897-1966