Genuine crushed linseed : containing all the natural oil / Parkinsons, chemists, Burnley. https://www.rawpixel.com/image/13956543/image-public-domain-poster-signFree Image from public domain licenseBurnley mechanics institution. Process print after J. Green. https://www.rawpixel.com/image/13962733/burnley-mechanics-institution-process-print-after-greenFree Image from public domain license