https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13954020Edit ImageSaveSaveEditCropCustom TextAcoustics: a telephonic demonstration at an exhibition (in Paris). Wood engraving, ca.1889.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 837 x 1200 px | 300 dpiLarge JPEG 2200 x 3155 px | 300 dpiFree DownloadAcoustics: a telephonic demonstration at an exhibition (in Paris). Wood engraving, ca.1889.More