https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13996880Edit ImageSaveSaveEditCropCustom TextJohn William Strutt, 3rd Baron Rayleigh. Photogravure after Sir G. Reid.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 1031 px | 300 dpiLarge JPEG 2868 x 2464 px | 300 dpiFree DownloadJohn William Strutt, 3rd Baron Rayleigh. Photogravure after Sir G. Reid.More