fire-box, 110; total, 1,313; and the engine weighs 42 tons in working
order. These engines take fourteen coaches, or a gross load of 222 tons,
at 50 miles an hour over gradients of 1 in 120 to 1 in 130, with a
consumption of 28 lb. of coal per mile. The London, Chatham, and Dover
Company has also some fine engines of a similar type. They have inside
cylinders 17½ in. diameter and 26 in. stroke; the coupled wheels are 6 ft.
6 in. diameter, and the bogie wheels 3 ft. 6 in., the wheel base to the
center of the bogie pin being 18 ft. 2 in. The boiler is 10 ft. 2 in. long
and 4 ft. 2 in. diameter, the grate area is 16.3 square feet, and the
heating surface is, in the tubes, 962 square feet; fire-box, 107 square
feet; total, 1,069. The boiler pressure is 140 lb., and the tractive force
per lb. of steam in the cylinder 102 lb. The weight in full working order
is, on the bogie wheels, 15 tons 10 cwt.; driving wheels, 13 tons 10 cwt.;
trailing wheels, 13 tons; total, 42 tons.

Mr. Worsdell has lately designed for the Great Eastern Railway a fine type
of coupled express engine, which deserves mention. It has inside
cylinders 18 in. diameter and 24 in. stroke, with coupled wheels 7 ft.
diameter and leading wheels 4 ft. diameter, the latter being fitted with a
radial axle on a somewhat similar plan to that previously described as
adopted by Mr. Webb for the new North-Western engines; the frames are
single, with inside bearings to all the wheels, and Joy's valve gear is
used. The boiler pressure is 140 lb., and the tractive power per lb. of
mean cylinder pressure 92 lb. The total wheel base is 17 ft. 6 in. The
boiler, which is fed by two injectors, is of steel, 11 ft. 5 in. long and
4 ft. 2 in. diameter. The grate area is 17.3 square feet, and the heating
surface is, in the tubes, 1,083; fire-box, 117; total, 1,200 sq. ft. The
weight in working order is, on the leading wheels, 12 tons 19 cwt.;
driving wheels, 15 tons; trailing wheels, 13 tons 4 cwt.; total, 41 tons 3
cwt. These engines burn 27 lb. of coal per train mile with trains