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.
LaNatureMachineGramme. fr Coupes de la machine de Gramme cnam fr cgi KY author Custom marker PDold La Nature Revue des Sciences Uploaded with Znobe Gramme
Page 2023 Free-images.com. All images are Public Domain