The laboratory of J.B. Boussingault in Liebfrauenberg abbey, Gœrsdorf, France: interior. Photograph. https://www.rawpixel.com/image/13974474/photo-image-person-fireplace-hospitalFree Image from public domain licenseAgeratina altissima 3, White Snakeroot, Howard County, Md, Helen Lowe Metzman https://www.rawpixel.com/image/8756546/photo-image-flower-plant-public-domainFree Image from public domain licenseNomada maculata, m, left side, Charles Co. MarylandThe only bidentate Nomada I feel comfortablish identifying. https://www.rawpixel.com/image/8756877/photo-image-public-domain-bee-animalFree Image from public domain license[Untitled photo, possibly related to: Kingman (vicinity), Arizona. Mr. Relling, in the laboratory, analyzing tungsten ore… https://www.rawpixel.com/image/12297277/photo-image-dog-face-paperFree Image from public domain licenseA milk tester for the Triple B milk testing associations. His equipment includes test tubes, pipettes, a centrifuge and… https://www.rawpixel.com/image/12276710/photo-image-shadow-cat-personFree Image from public domain license