https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13962999Edit ImageSaveSaveEditCropCustom TextBallooning: hydrogen barrels and other equipment used in ballooning. Engraving by W. Lowry, 1803.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 983 px | 300 dpiLarge JPEG 2920 x 2392 px | 300 dpiFree DownloadBallooning: hydrogen barrels and other equipment used in ballooning. Engraving by W. Lowry, 1803.More