Checked content

File:Heinrich Rudolf Hertz.jpg

Description This is Heinrich Rudolf Hertz, from Oliver Heaviside: Sage in Solitude ( ISBN 0-87942-238-6), p. 111. The image is reprinted courtesy of the Burndy Library (as stated in the credits in the back of the book, p. 318), but its age implies that it's public domain. (It must have been made in 1894 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.
Date Photo first published 1894 at the latest
Source
This file is lacking source information.

Please edit this file's description and provide a source.
Author Robert Krewaldt


Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to Australia, the European Union and those countries with a copyright term of life of the author plus 70 years.

Dialog-warning.svg You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years, Russia has 74 years for some authors. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement the rule of the shorter term.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
Public domain This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1923.

Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
The following pages on Schools Wikipedia link to this image (list may be incomplete):

Background information

SOS Children's Villages chose the best bits of Wikipedia to help you learn. SOS Children works in 133 countries and territories across the globe, helps more than 62,000 children, and reaches over 2 million people in total. You can help by sponsoring a child.