https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13994368Edit ImageSaveSaveEditCropCustom TextProcessing of sulphuric acid and section of a chimney used. Etching by Bénard after L.J. Goussier.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 768 x 1200 px | 300 dpiLarge JPEG 2150 x 3361 px | 300 dpiFree DownloadProcessing of sulphuric acid and section of a chimney used. Etching by Bénard after L.J. Goussier.More