Edouard Butikofer of Switzerland displayed a "motocycle" (motor bicycle) on the Peugeot stand at the Paris Salon of 1898. The Butikofer is discussed in "The Horseless Age" of April 1896, and in a short article in The Automobile Magazine of December 1899
In 1906 he created a flat-twin engine which he mounted in a tricycle.
L'Anatomie du moteur à essence. Butikofer (p.809) La locomotion automobile, 21st Dec 1899.
Sources: Zhumoriste, archive.org, cnum.cnam.fr.
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