https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8769971Edit ImageSaveSaveEditCropCustom TextWorker finishing the end of a sulphur determinator, March 1937. Photographer: Hine, Lewis. Original public domain image from FlickrMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGLarge 3000 x 2121 px | 300 dpiFree DownloadWorker finishing the end of a sulphur determinator, March 1937. Photographer: Hine, Lewis. Original public domain image from FlickrMore