y magnitude,--namely, in 1748, 1786, 1805,
1820 and 1845. The river is usually closed by ice from November or
December to March or April, and at rare intervals it freezes in October.
At Aksai, in the delta, it remains open on the average for 250 days in
the year, at the mouth of the Medvyeditsa for 239, and at Novo-Cherkask,
on another arm of the delta, for 246. This river supports a considerable
fishing population, who despatch salt fish and caviare all over Russia.
Salmon and herrings are taken in large numbers. (P. A. K.; J. T. BE.)

DON, a river in the south of Aberdeenshire, Scotland, rising in
peat-moss to the east of Glen Avon on the borders of Banffshire, at a
height of nearly 2000 ft. above the sea. It follows a generally easterly
course, roughly parallel with that of the Dee, and a few miles to the
south of it, falling into the North Sea close to Old Aberdeen, after a
run of 82 m. At the mouth the two rivers are only 2-1/3 m. apart. Like
its greater neighbour, the Don is an excellent salmon stream. On the
left its chief affluents are the Ernan, Nochty, Bucket and Urie; on the
right, the Conrie, Carvie, Deskry and Strow. The principal places of
interest on its banks are Strathdon, Towie, Kildrummy, Alford, Keig,
Monymusk, Inverurie, Kintore and Dyce.

DONAGHADEE, a market town of Co. Down, Ireland, in the north
parliamentary division, near the south of Belfast Lough, on the Irish
Channel, 25 m. E. by N. of Belfast by a branch of the Belfast and Co.
Down railway. Pop. (1901) 2073. It is the nearest port in Ireland to
Great Britain, being 21-1/2 m. S.W. of Portpatrick in Wigtownshire.
Telegraph and telephone cables join these ports, but a regular passenger
route does not exist owing to the unsuitability of Portpatrick.
Donaghadee harbour admits vessels up to 200 tons. On the north-east
side of the town there is a rath or encampment 70 ft. high, in which a
powder magazine is erected. The parish church dates from 1626. There are
two holy wells in the town. The town is frequented as a seaside
watering-place in the summer months.

DONALDSON, SIR JAMES (1831- ), Scottish classical scholar, educational
and theological writer, was born at Aberdeen on the 26th of April 1831.
He was educated at Aberdeen University and New College, London. In 1854
he was appointed rector of the Stirling high school, in 1866 rector of
that of Edinburgh, in 1881 professor of humanity in the university of
Aberdeen, a