https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13953476Edit ImageSaveSaveEditCropCustom TextA printing press with a pair of legs brandishes a quill wrapped around with hissing snakes and sends all those around it flying off. Coloured etching by Paul Pry (William Heath).Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 816 x 1200 px | 300 dpiLarge JPEG 2244 x 3299 px | 300 dpiFree DownloadA printing press with a pair of legs brandishes a quill wrapped around with hissing snakes and sends all those around it flying off. Coloured etching by Paul Pry (William Heath).More