This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Baron Kelvin. en William Thomson st Baron Kelvin nlm nih gov author date The National Library of Medicine believes this item to be in the public domain PDold William Thomson st Baron Kelvin
Page 2023 Free-images.com. All images are Public Domain