Go back to article: Technologies of Romance: Valentine from a Telegraph Clerk ♂ to a Telegraph Clerk ♀: the material culture and standards of early electrical telegraphy

Figure 7

Photogravure portrait of Georg Simon Ohm alongside a colour photograph of a standard one ohm resistor circa1883

Left: Science Museum object 1982-1459/52, Portrait, photogravure, Georg Simon Ohm  

Right: Science Museum object 1980-34, Standard resistor, 1 ohm, c 1883