The ninth is in a very deep and wide bottom, on the heights of Soncieu. The aqueduct, when it arrives at this bottom, is terminated with a reservoir at the south edge of the valley of the river Garon. The mode by which the water passed this profound chasm, was by causing it to flow from a reservoir on the one side, in leaden pipes^ bedded in the sides of the valley along part of the descent it then flowed in continued ;

34 PRELIMINARY ESSAY.

pipes of the same sort, bedded on a bridge, whose top course was built in a descending or reversed curve having thus passed over this bridge, when they came at a certain ;

side of the valley, they were protruded up in pipes, bedded as height, on the opposite before, on the opposite sides of the valley, and the water was delivered in another reservoir on the top of this opposite hill, called the reservoir of Chaponost. From this reservoir, the water entered into the aqueduct of Chaponost, which runs under ground

along the west side of the village. It emerges on the north, and flows over a bridge composed of ninety arches, of which more than sixty, in Delorme's time, were remaining. This was terminated by a reservoir, whence the water, in like manner as before, descended by pipes into another valley, and in part passed it and the river Baunan, over a bridge of a reversed curvature, and mounted again on the opposite side, there entering a second reservoir at St. Foi.