https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13957873Edit ImageSaveSaveEditCropCustom TextMachines: a gas-fired glass-furnace, long and short sections, plan and details. Engraving, after 1861.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 876 px | 300 dpiLarge JPEG 3094 x 2259 px | 300 dpiFree DownloadMachines: a gas-fired glass-furnace, long and short sections, plan and details. Engraving, after 1861.More