This article was written by Paul de Vivie. He advocates a 3 speed system (of some sort) with développements of 3.00m, 4.75m and 6.50m (roughly 38”, 60” and 81”). Apparently ideal for a leisurely ride up to the observatory on Mt Ventoux.

(Source gallica.bnf.fr/ Bibliothèque nationale de France)

• Publisher: T.C.F. Revue Mensuelle
• Country: France
• Date: January 1898
• Derailleur brands: de Vivie
• Derailleurs: none