Tay

a river of Scotland whose drainage area lies almost wholly within Perth shire; rises on the northern slope of Ben Lui, on the Argyll and Perth shire border, and flowing 25 m. NE. under the names of Fillan and Do chart, enters Loch Tay, whence it sweeps N., SE., and E., pa ing Aberfeldy, Dunkeld, Perth, and Dundee, and enters the North Sea by a noble estuary 25 m. long and from ½ m. to 3½ m. broad; chief affluents are the Tummel, Isla, Almond, and Earn; discharges a greater body of water than any British stream; is renowned for the beauty of its scenery, and po e es valuable salmon fisheries; has a total length of 120 m., and is navigable to Perth; immediately W. of Dundee it is spanned by the Tay Bridge , the longest structure of its kind in the world, consisting of 95 spans, with a total width of 3440 yards; Loch Tay, one of the finest of Highland lochs, lies at the base of Ben Lawers, stretches 14½ m. NE. from Killin to Ken more, and varies from ½ m. to 1½ m. in breadth.