Dr Cornelis Hendrik à Roy (1751-1833), Physician and Biographer (1833) by Jan Adam Kruseman https://www.rawpixel.com/image/13744706/image-face-person-artFree Image from public domain licenseMr. Dickerson, farmer, who owns and runs a ski tow on hill in back of his farmhouse. It cost him about one thousand dollars… https://www.rawpixel.com/image/12244053/photo-image-face-hand-personFree Image from public domain licenseStripping cow after being milked with electric milker. Mineral King cooperative farm. Tulare County, California by Russell… https://www.rawpixel.com/image/12149399/image-cow-hand-personFree Image from public domain licenseWilliam Hyde Wollaston. Line engraving by W. Skelton, 1830, after J. Jackson. https://www.rawpixel.com/image/13992517/william-hyde-wollaston-line-engraving-skelton-1830-after-jacksonFree Image from public domain license