https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13976932Edit ImageSaveSaveEditCropCustom TextWorkers using apparatus in a chemical laboratory. Etching, ca. 1769.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 753 px | 300 dpiLarge JPEG 3250 x 2039 px | 300 dpiFree DownloadWorkers using apparatus in a chemical laboratory. Etching, ca. 1769.More