e is remarkable for the great weight
thrown on the driving wheels, and its cylinder power is great in
proportion to its adhesion, thus allowing the steam to be worked at a high
rate of expansion, which is most favorable to the economical consumption
of fuel. There are numerous fine engines running on other lines, such as
the new bogie locomotives on the North-Eastern and Lancashire and
Yorkshire railways, and the coupled express engines on the Caledonian; but
those already described represent fairly the lending features of modern
practice, and the author will now notice briefly the two other classes of
engines--tank passenger engines for suburban and local traffic and goods
engines. The Brighton tank passenger engine is a good example of the
former class; it has inside cylinders 17 in. diameter and 24 in. stroke.
The two coupled wheels under the barrel of the boiler are 5 ft. 6 in.
diameter, and the trailing wheels 4 ft. 6 in.; there are single frames
with inside bearings to all the axles. The boiler pressure is 140 lb., and
the tractive force per pound of mean cylinder pressure 106 lb.; the total
wheel base is 14 ft. 6 in. The boiler is 10 ft. 2 in. long and 4 ft. 4 in.
diameter, and the heating surface is in the tubes, 858 square feet;
fire-box, 90 square feet; total, 948 square feet. The engine is furnished
with wing tanks holding 860 gallons of water, and carries 30 cwt. of coal.
The weight in working order is 38 tons. These engines have taken a maximum
load of twenty-five coaches between London and Brighton, but are mainly
employed in working the suburban and branch line traffic; their average
consumption of coal is 23.5 lb. per mile, with trains averaging about ten
coaches.

Another example is Mr. Webb's tank engine on the North-Western Railway,
which presents a contrast to the foregoing. It has inside cylinders 17 in.
diameter and 20 in. stroke, coupled wheels 4 ft. 6 in. diameter, and a
tractive power per lb. of mean cylinder pressure of 107 lb.; the wheel
base is 14 ft. 6 in. with a radial box to the leading axle; the heating
surface is in the tubes, 887; fire-box, 84; total, 971 square feet; the
weight in working order is 35 tons 15 cwt. The engine is fitted with
Webb's hydraulic brake, and steel, manufactured at Crewe, is largely used
in its construction. The consumption of coal-working fast passenger trains
has been 281/2 lb. per mile. There are many other types, such as the ten
wheel bogie tank engines of th