Blank greetings card with envelope featuring:

Sir Benjamin Thompson, Count von Rumford NPG 1332

© National Portrait Gallery, London

after Moritz Kellerhoven

Born and raised in Massachusetts, Thompson arrived in England in 1776, where he conducted experiments with gunpowder. He served (1780-81) as undersecretary of the colonies, and later entered the service of the elector of Bavaria. He was knighted in 1784 and in 1791 was created count of the Holy Roman Empire. Returning to England in 1795, Thompson introduced improvements for chimneys and fireplaces and invented the double boiler, and the kitchen range. He developed a more accurate theory of heat, claiming in a paper he... more

Card size: 125mm x 175mm

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