Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Johnson John Bertrand F5

Share This


Johnson John Bertrand F5

How will you use this image ?
Select one of the following options.
Individual Use
Not-for-profit Use
For-profit Use (educational only)
Not sure yet

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.

Image title: 
Dr. H. Snook lectures on progress made in science durning 1927
Credit line: 
AIP Emilio Segrè Visual Archives

Progress made in science durning 1927 is reviewed by Dr. H. Snook before New York Electrical Society, in a lecture on January 26th, this year. On the platform with Dr. Snook (center) is W.O. Osbon, (right - - demonstrating the new Westinghouse high quality loud speaker); R.J. Wensley, of Westinghouse, demonstrated his 'mechanical man' -- the Televox. J.F. Wentz (left) of the Bell Telephone Laboratories, and J.H. Rohrbaugh, (third from left) also Bell Telephone Laboratories, demonstrated the magnetic turning of atoms and the thermal noise of electrons flowing in a conductor. This latter phenomenon is called the 'Johnson effect'. Dr. J. B. Johnson, of the Bell Telephone Laboratories, its discoverer, is standing second from the left.

Original format: 
1 photographic print (black and white; 8 x 6 inches)
Johnson, John Bertrand