He went on to attend the École nationale des ponts et chaussées (School of Bridges and Roadways) and graduated first in his class in 1888.

[3] Very early in his career he suffered immobility due to a paralysis of his legs, which confined him to his room for 27 years, but he never stopped working.

[1] In 1893 André Blondel sought to solve the problem of integral synchronization, using the theory proposed by Cornu.

He determined the conditions under which the curve traced by a high-speed recording instrument would follow as closely as possible the actual variations of the physical phenomenon being studied.

They remained the best way to record high-speed electrical phenomena for more than 40 years[citation needed] when they were replaced by the cathode ray oscilloscope.

This analysis had also been done a little earlier by another electrical engineer, Paul Boucherot, using a different approach, and the two authors arrived at similar conclusions.