https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13972667Edit ImageSaveSaveEditCropCustom TextThe interior of a chemical laboratory with six people working in it (above), a table of symbols (below). Coloured line engraving after L.-J. Goussier.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 808 px | 300 dpiLarge JPEG 1670 x 1124 px | 300 dpiFree DownloadThe interior of a chemical laboratory with six people working in it (above), a table of symbols (below). Coloured line engraving after L.-J. Goussier.More