https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13994240Edit ImageSaveSaveEditCropCustom TextThe spectroscope in medicine / by Charles A. MacMunn.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 780 x 1200 px | 300 dpiLarge JPEG 1138 x 1750 px | 300 dpiFree DownloadThe spectroscope in medicine / by Charles A. MacMunn.More