https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13986283![Engineering: four machines. Lithograph by Martin and Hood, 1852, after W. J. Lindsey.](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djZ2ZhbmNrbTktaW1hZ2UuanBn.jpg)
![Engineering: four machines. Lithograph by Martin and Hood, 1852, after W. J. Lindsey.](https://images.rawpixel.com/image_social_portrait/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djZ2ZhbmNrbTktaW1hZ2UuanBn.jpg)
Engineering: four machines. Lithograph by Martin and Hood, 1852, after W. J. Lindsey.
Engineering: four machines. Lithograph by Martin and Hood, 1852, after W. J. Lindsey.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use