https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13992679Edit ImageSaveSaveEditCropCustom TextOptics: a variety of microscopes and specimens. Engraving, c.1770.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 929 px | 300 dpiLarge JPEG 3264 x 2528 px | 300 dpiFree DownloadOptics: a variety of microscopes and specimens. Engraving, c.1770.More