https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13957653Edit ImageSaveSaveEditCropCustom TextA labelled section through a porter brewery. Engraving by Mutlow, c. 1812, after J. Farey.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 722 px | 300 dpiLarge JPEG 3423 x 2059 px | 300 dpiFree DownloadA labelled section through a porter brewery. Engraving by Mutlow, c. 1812, after J. Farey.More