Who was the French professor that the Robert brothers built the world's first hydrogen balloon for?
Jacques Charles Jacques Alexandre César Charles (November 12, 1746 – April 7, 1823) was a French inventor, scientist, mathematician, and balloonist.
André Rouillé André Rouillé ( fr.. "André Rouillé", born in 1948 in France) – historian and theorist of photography, professor at University Paris 8, author of a significant number of books on photography and contemporary art, founder and editor-in-chief of www.paris-art.com, the first French website devoted to contemporary culture.