The Impulsoria was a locomotive constructed in 1850 that was powered via a gearbox by one-two to four horses on a treadmill following a design by Clemente Masserano.

[1] A syndicate was formed and it was trialled at the Nine Elms terminus of the South Western Railway line in London where it successfully completed a hill climb.

The device allowed a steam locomotive to be replaced by this vehicle, which used the power of two or four horses that had to walk up a treadmill, called a pedivella by Masserano.

During trials at Nine-Elms terminus of the South Western Railway, the two-horse Impulsoria travelled at 7 mph (11 km/h) pulling one wagon within the station.

[1] An Italian Professor of Philosophy, Dr Andrea Crestadoro, improved the design of this unusual device, and later took out related patents in 1852.