When Mr. W. Pettigrew, M. Inst.C.E., who was, during the latter years of Mr. Adams’ régime, practically the chief at Nine Elms Locomotive Works, was appointed locomotive superintendent at Barrow, to succeed Mr. Mason, he got out designs for a new and powerful class of goods engines, which are now being delivered to the Furness Railway. Fig. 140 represents one of these engines, the leading dimensions of which are:—

Fig. 141 represents one of the Highland Railway’s 10-wheel main line engines, with outside cylinders. The six-coupled wheels make this design to be well adapted for the heavy traffic of the system, whilst the leading bogie gives sufficient facility for easily negotiating the curves of the Highland Railway.

The first newest class of express engines, designed by Mr. P. Drummond, is just delivered, and is very similar to those designed for the Highland Railway by Mr. D. Jones, the late locomotive superintendent, except that the new class has inside cylinders, whilst those built two years ago had outside cylinders. The dimensions of No. 1, “Ben-y-Gloe,” just delivered, are: cylinders, 18¼in. by 26in. The coupled wheels 6ft. and the leading bogie wheels 3ft. 6in. diameter. Heating surface, 1,175 sq. ft. Steam pressure, 175lb. per sq. in. Weight, in working order: engine, 46 tons; tender, 37½ tons.

Mr. H. Pollitt’s design of locomotive for working the express traffic over the London extension of the Great Central Railway has four-coupled wheels 7ft. diameter; cylinders, 18½in. by 26in., with piston valves; a Belpaire fire-box, and steam-pressure 170lbs. per sq. in. The tender holds 4,000 gallons of water and 5 tons of coal.

Before closing this account of locomotive evolution, some few details of modern Irish locomotives will be of interest.

Fig. 142 represents a four-coupled passenger engine of the Belfast and Northern Counties Railway. This engine is of the compound type, and is fired by petroleum on Holden’s system.

“Jubilee” (Fig. 143) is also a compound express passenger engine of the same railway. Both these engines were designed by Mr. B. Malcolm, the Company’s locomotive superintendent. The modern passenger engines on the Great Northern Railway (Ireland) are of the four-coupled type, with a leading bogie, and are known as the “Rostrevor” class. The leading dimensions are as follows:—

Fig. 144 represents one of the engines of the Great Northern (Ireland) Railway, as decorated to haul the Duke of York’s train during his recent visit to Ireland.

Fig. 145 is from a photograph of one of the standard passenger engines of the Great Southern and Western Railway. This engine was designed by Mr. R. Coey, the Company’s locomotive superintendent. The coupled wheels are 6ft. 6in. diameter, the cylinders being 18in. diameter, with a stroke of 24in.

Our last illustration (Fig. 146) is produced from a photograph of “Peake,” one of the “light” engines of the Cork and Muskerry Light Railway. Engines of this type are specially designed for working on “light” railways.