He was not able to complete the course; however, he must have made a good impression, as he was employed as a secretary to the director of the school, Charles Combes.

[1] At Creil, from 1876 to 1886, Deprez conducted the first experiments to transmit electrical power over long distances.

The first successful attempt took place in 1882 from Miesbach to Munich at the occasion of the Exposition of Electricity in the Glaspalast organised by Oskar von Miller.

[2] Deprez conducted experiments in La Chapelle, Grenoble, Vizille, Paris, and Creil.

In 1889, René Thury continued his approach of arranging generators in series, eventually developing commercial systems delivering 20 megawatts at 125 kV over 230 kilometers.