Its chief tributaries on this last portion of its course are the Alz and the Salzach, and at Passau, 309 m.
The large majority of the population of the city is Roman Catholic.
The plateau portion of West Virginia is largely covered by hardwood forests, but along the Ohio river and its principal tributaries the valuable timber has been removed and considerable areas have been wholly cleared for farming and pasture lands.
Reaches Benevento, near which it receives several tributaries; then curves round the mountain mass to the N.
On the western side there are no tributaries at the present day.
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