https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13998220Edit ImageSaveSaveEditCropCustom TextChinese pulse chart, 17th century.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 1134 px | 300 dpiLarge JPEG 3100 x 2930 px | 300 dpiFree DownloadChinese pulse chart, 17th century.More