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.
JFCHessel. en Nineteenth century drawing of Johann Friedrich Christian Hessel nineteenth century drawing of unknown origin Author public domain PDArt Scientists from Germany Mineralogists from Germany births deaths University of Marburg faculty
Page 2023 Free-images.com. All images are Public Domain