Magnetism: electrical equipment and magnetic phenomena. Adapted from a coloured engraving by J. Emslie, (1850). Wellcome Collection. 170mm x 120mm (6 3/4" x 4 3/4"). Blank inside. Individually wrapped in a compostable bag with a 120gsm recycled kraft envelope. Printed with vegetable-based inks on a carbon neutral press using responsibly sourced, 300gsm Italian paper.