https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13999723Edit ImageSaveSaveEditCropCustom TextGustav August von Braun . Photograph by J. Löwy.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 806 x 1200 px | 300 dpiLarge JPEG 2171 x 3232 px | 300 dpiFree DownloadGustav August von Braun . Photograph by J. Löwy.More