C. Lloyd Morgan. Photogravure by Synnberg Photo-gravure Co., 1898. https://www.rawpixel.com/image/14010249/lloyd-morgan-photogravure-synnberg-photo-gravure-co-1898Free Image from public domain licenseM0004947: Portrait of Antonie van Leeuwenhoek (1632-1723) https://www.rawpixel.com/image/13975298/m0004947-portrait-antonie-van-leeuwenhoek-1632-1723Free Image from public domain licenseI.P. Pavlov at his desk in the Imperial Military Medical Academy, St Petersburg. Photograph, 1904. https://www.rawpixel.com/image/13992823/photo-image-person-man-public-domainFree Image from public domain licenseHet lossen van karren bij een vaart (1864 - 1936) by Jan van Essen https://www.rawpixel.com/image/13788526/het-lossen-van-karren-bij-een-vaart-1864-1936-jan-van-essenFree Image from public domain licenseRoman aqueduct, Merida, near Badajoz, Spain. Photograph Foto Aida, 1910/1936. https://www.rawpixel.com/image/14016973/roman-aqueduct-merida-near-badajoz-spain-photograph-foto-aida-19101936Free Image from public domain licenseJordan, Montana. This town, with a population of 500, had its first telephone installed in 1936. Sourced from the Library of… https://www.rawpixel.com/image/12286866/photo-image-person-sky-roadFree Image from public domain licenseRopesville Farms, Texas, April 1936. United States Resettlement Administration rural rehabilitation project. One of the… https://www.rawpixel.com/image/12265938/photo-image-plant-grass-skyFree Image from public domain license[Untitled photo, possibly related to: Ropesville Farms, Texas, April 1936. United States Resettlement Administration rural… https://www.rawpixel.com/image/12268493/photo-image-plant-sky-technologyFree Image from public domain license[Untitled photo, possibly related to: Monument on eighty-acre state memorial park, Jefferson Davis Park, bound on three… https://www.rawpixel.com/image/12269588/photo-image-plant-person-forestFree Image from public domain licenseFlathead Valley special area project, Montana. Uncleared land, typical of Flathead Valley, where farmers from the drought… https://www.rawpixel.com/image/12286948/photo-image-plant-sky-forestFree Image from public domain license[Untitled photo, possibly related to: Ropesville Farms, Texas, April 1936. United States Resettlement Administration rural… https://www.rawpixel.com/image/12268268/photo-image-cloud-plant-skyFree Image from public domain license[Untitled photo, possibly related to: Cimarron County, Oklahoma. April, 1936. Dust Bowl]. Sourced from the Library of… https://www.rawpixel.com/image/12268245/photo-image-face-people-horseFree Image from public domain license[Untitled photo, possibly related to: Ropesville Farms, Texas, April 1936. United States Resettlement Administration rural… https://www.rawpixel.com/image/12268505/photo-image-cloud-sky-technologyFree Image from public domain licenseParkin (vicinity), Arkansas. The families of evicted sharecroppers from the Dibble plantation. Were legally evicted the week… https://www.rawpixel.com/image/12267475/photo-image-plant-people-treeFree Image from public domain licenseBarn on J.E. Herbrandson farm near Estherville, Iowa. Owner-operated. This farm is under heavy mortgage. It was bought… https://www.rawpixel.com/image/12173786/image-art-sky-vintageFree Image from public domain license[Untitled photo, possibly related to: Ropesville Farms, Texas, April 1936. United States Resettlement Administration rural… https://www.rawpixel.com/image/12268492/photo-image-cloud-sky-technologyFree Image from public domain license[Untitled photo, possibly related to: Cimarron County, Oklahoma. April, 1936. Dust Bowl]. Sourced from the Library of… https://www.rawpixel.com/image/12268253/photo-image-dog-cow-personFree Image from public domain license[Untitled photo, possibly related to: Ropesville Farms, Texas, April 1936. United States Resettlement Administration rural… https://www.rawpixel.com/image/12268256/photo-image-cow-person-skyFree Image from public domain license[Untitled photo, possibly related to: Parkin (vicinity), Arkansas. The families of evicted sharecroppers of the Dibble… https://www.rawpixel.com/image/12271274/photo-image-face-person-animalFree Image from public domain licenseParkin (vicinity), Arkansas. The families of evicted sharecroppers of the Dibble plantation. They were legally evicted the… https://www.rawpixel.com/image/12267478/photo-image-person-public-domain-familiesFree Image from public domain licenseParkin (vicinity), Arkansas. The families of evicted sharecroppers of the Dibble plantation. They were legally evicted the… https://www.rawpixel.com/image/12267473/photo-image-cow-plant-personFree Image from public domain licenseFlathead Valley special area project, Montana. Uncleared land, typical of Flathead Valley, where farmers from the drought… https://www.rawpixel.com/image/12286731/photo-image-plant-person-skyFree Image from public domain licenseParkin (vicinity), Arkansas. The families of evicted sharecroppers of the Dibble plantation. They were legally evicted the… https://www.rawpixel.com/image/12267477/photo-image-face-person-public-domainFree Image from public domain license[Untitled photo, possibly related to: Ropesville Farms, Texas, April 1936. United States Resettlement Administration rural… https://www.rawpixel.com/image/12268507/photo-image-cloud-person-skyFree Image from public domain licenseMonument on eighty-acre state memorial park, Jefferson Davis Park, bound on three sides by Irwinville Farms, Georgia… https://www.rawpixel.com/image/12268901/photo-image-plant-person-skyFree Image from public domain license[Untitled photo, possibly related to: Ropesville Farms, Texas, April 1936. United States Resettlement Administration rural… https://www.rawpixel.com/image/12268248/photo-image-plant-sky-treeFree Image from public domain license[Untitled photo, possibly related to: Ropesville Farms, Texas, April 1936. United States Resettlement Administration rural… https://www.rawpixel.com/image/12268497/photo-image-sky-technology-public-domainFree Image from public domain license