John Henry Poynting

Kreditera:

from Oliver Heaviside: Sage in Solitude (ISBN 0-87942-238-6), p. 117.

Kort länk:

https://sewiki.info/b/7cbb0

Källa:

Wikimedia Commons

Upplösning:

554 x 754 Pixel (102557 Bytes)

Licens:

Public domain

Licenskommentaren:

Attribution is not provided for the image, but its age implies that it's public domain. (It must have been made in 1914 or earlier.) It was scanned on an Epson Perfection 1250 at 400dpi, cleaned up (some text was showing through the back) in Photoshop, reduced to grayscale, and saved as JPG using the 'Save for Web' optimizer. (From Grendelkhan)