Page:Transactions of the Geological Society, 1st series, vol. 2.djvu/45

Rh empties itself into the sea has but a very inconsiderable fall. From Crammag-bridge down to Sulby the stream runs at the rate of 452 feet within three miles; from thence higher up near to its source no computation of the kind can be made, as it is no longer one regular body of water but an assemblage of many little rivulets flowing down from the slopes of the mountains in every direction, particularly from the mountainous pasturage called Mount-Pellier.

The watershed of the elevated and boggy table-land that separates Mullach-Oure from the central line of mountains, gives rise to two other water courses, which from their common origin run in a contrary direction. The Bright-river after it has watered the Baldwin-valley empties itself into the sea at Douglass. The Laxey river flows through the valley of that name. Allowance being made for the windings of the Bright-river, it falls at the rate of 1395 feet within six miles, a fall rather considerable.

Both the Black-water and the Peel-river that issue from the watershed between Douglass and Peel-town are inconsiderable streams.

From the southern group of mountains come out two or three rivers, Glen-Moy, Cass-ny-Hawin and Castle-town rivers; the two latter flowing into the eastern part of the Irish Channel, and the first into the western.

The vale that is irrigated by the Moy river (Muigh a Druid) is extremely picturesque, the windings, which are short and frequent, expose unexpectedly to the traveller's eye, scattered cottages along the sides of the river. Cass-ny-Hawin and Castle-town rivers have a course much more open, owing to the character of the country which they traverse. Several other streams indent the coast of the island, which from the shortness of their course and the diminutive quantity of water they discharge into the sea, do not seem entitled to any farther notice.

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