Sixteen French doctors with attributes of their specialties. Colour lithograph by A. Barrère, ca. 1906. https://www.rawpixel.com/image/13960983/image-cartoon-person-artFree Image from public domain license"Berlin to New York in less than One Hour!" written by Hugo Gernsback and illustrated by Frank R. Paul in the November 1931… https://www.rawpixel.com/image/7665177/image-paper-art-vintageFree Image from public domain licenseThe Islands at Matsushima (1915) print in high resolution by Friedrich Capelari. Original from the Saint Louis Art Museum. https://www.rawpixel.com/image/7635707/image-art-vintage-public-domainFree Image from public domain licenseNederlandse gezin Bergsma en Indonesische man in auto op Sumatra, hond op de treeplank (1914 - 1926) by anonymous https://www.rawpixel.com/image/13733724/image-dog-palm-tree-faceFree Image from public domain licenseFourth International Congress of Zoology , Cambridge University; nine scientists, in academic dress. Photograph by F.J.… https://www.rawpixel.com/image/14020149/photo-image-person-clothing-manFree Image from public domain licenseBritish Association for the Advancement of Science: speakers at its meeting in Cambridge in 1904. Drawing by A.S. Boyd, 1904. https://www.rawpixel.com/image/14004778/image-paper-cartoon-faceFree Image from public domain license