https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13977600![A man designated as Philibert Maurice D'Ocagne. Photograph by G.L. Manuel.](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djY205dDhzdHctaW1hZ2UuanBn.jpg)
![A man designated as Philibert Maurice D'Ocagne. Photograph by G.L. Manuel.](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djY205dDhzdHctaW1hZ2UuanBn.jpg)
A man designated as Philibert Maurice D'Ocagne. Photograph by G.L. Manuel.
A man designated as Philibert Maurice D'Ocagne. Photograph by G.L. Manuel.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use