Lazare Carnot, French politician, engineer, and mathematician, 1898. Artist: Gilbert
Lazare Carnot, French politician, engineer, and mathematician, 1898. A print from Les Francais Illustres, by Gustave Demoulin, Hachette, Paris, 1898
Charles William Siemens, DCL, FRS, German electrical engineer and inventor, 1883. Artist: Lock & Whitfield
Charles William Siemens, DCL, FRS, German electrical engineer and inventor, 1883. From Men of Mark: a gallery of contemporary portraits of men distinguished in the Senate, the Church, in science