In 1871, the Belgian electrical engineer Zenobe Theophile Gramme invented the Gramme machine, the first commercially viable electrical generator, in Paris. Unlike earlier generators that produced pulsating direct current, the Gramme machine used a ring-shaped armature that delivered a much smoother and more continuous current, making it far more useful for industrial applications. Manufactured in Paris by the Gramme company, this dynamo became the standard electrical generator for the next two decades and was instrumental in the rapid spread of electrical technology across Europe.

The Gramme machine's commercial success in Paris coincided with the rise of literary Naturalism, led by Emile Zola, who was fascinated by the mechanical and industrial forces reshaping French society. The smooth, continuous current of the Gramme machine, compared to the jerky output of earlier generators, provided a technological parallel to the Naturalist literary project of producing a continuous, unbroken flow of realistic narrative. The machine's manufacture in Paris, the literary capital of the Western world, ensured that electrical technology was a visible and discussed part of the city's intellectual environment during a crucial period of literary innovation.