https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13969999Edit ImageSaveSaveEditCropCustom TextOptics: a simple microscope. Coloured engraving by J. Pass, 1820.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 881 x 1200 px | 300 dpiLarge JPEG 2279 x 3104 px | 300 dpiFree DownloadOptics: a simple microscope. Coloured engraving by J. Pass, 1820.More