https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13972494Edit ImageSaveSaveEditCropCustom TextAdvert for Calvert's Dento-Phenolene, 1890s.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 771 px | 300 dpiLarge JPEG 3500 x 2250 px | 300 dpiBest Quality JPEG 7235 x 4651 px | 300 dpiFree DownloadAdvert for Calvert's Dento-Phenolene, 1890s.More