https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14009738Edit ImageSaveSaveEditCropCustom TextSir Charles Wheatstone. Stipple engraving by C. Cook after W.E. Kilburn.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 794 x 1200 px | 300 dpiLarge JPEG 2149 x 3246 px | 300 dpiFree DownloadSir Charles Wheatstone. Stipple engraving by C. Cook after W.E. Kilburn.More