Engines, dimensions of, on the Sœmmering Pass, [13];
number of, on British railways, [45];
fuel consumed by them, [50];
number of component parts, [172];
effects of bursting a tube, [173];
compared to horses, [186];
speeds of various classes of engines, [188];
great size and power of some on the Continent, [189];
inside and outside cylinder engines, [190];
names of makers of, [191];