Locomotives of 1907

The railway service of the United Kingdom was never more efficient than at the present time, and, speaking generally, it would be difficult to find a strict parallel for it in any other part of the world. The weight of the trains comprising the most important passenger services and the average speeds at which they are run, have both had an upward tendency, and the demand for locomotives capable of hauling these increasing loads without any diminution in the average velocity has advanced commensurately.