https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13960323Edit ImageSaveSaveEditCropCustom TextChemistry: a piece of steel wire burning in oxygen inside a glass jar. Mezzotint, 1809.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 980 x 1200 px | 300 dpiLarge JPEG 2400 x 2939 px | 300 dpiFree DownloadChemistry: a piece of steel wire burning in oxygen inside a glass jar. Mezzotint, 1809.More