Blank greetings card with envelope featuring:

William Thomson, Baron Kelvin NPG x18986

© National Portrait Gallery, London

probably by John Fergus

Professor of Natural Philosophy, Glasgow, for over fifty years and a dominant figure in nineteenth-century physics; famous for many researches, notably in electro- and thermodynamics; introduced absolute temperature scale, its unit being named in his honour.

Card size: 125mm x 175mm

Images are printed in their original proportions, within a white border.