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Rh wheels, iron-tyred. This motor had the interesting arrangements of the Dion carriage—that is, the use of a Cardan joint as a substitute for the Galle chain, and the movement of the wheel by means of a drilled nave.

Almost all the other vehicles were driven by Daimler petroleum motors. The vehicles of the firm Panhard and Levassor, which controls the Daimler patents in France, had at that time the same principal characteristics as they present



to-day, which have been generally adopted. The motor maintained a fairly constant velocity of 750 revolutions; it acted on the drive-wheels situated at the back by means of a friction cone, a series of variable gears, a differential and a Galle chain: the steering-wheels were in front. The four-seated carriage weighed about a ton.

These carriages, as also the Peugeot petroleum vehicles, the motors of which were built by Panhard and Levassor,