Career
He competed as a figure skater representing France. He is considered as the builder of the International Ice Hockey Federation (IIHF). He moved to France in 1889.
Magnus competed as a figure skater in the disciplines of single skating and pair skating in France.
He worked as a figure skating judge for France at many international events. He was the first IIHF president from 1908 to 1912 and then in 1914.
He wrote Les sports d"hiver with Renaud de la Fregeolière in 1911. In 1997, he was inducted in the IIHF Hall of Fame.
The French ice hockey league (Ligue Magnus) and its trophy (Coupe Magnus) are named after him.