https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14016856Edit ImageSaveSaveEditCropCustom TextBacteriological conference delegates, Berlin, May 1891. Photograph of a photograph, 1891.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 1197 px | 300 dpiLarge JPEG 1600 x 1596 px | 300 dpiFree DownloadBacteriological conference delegates, Berlin, May 1891. Photograph of a photograph, 1891.More