The above record, though almost valueless for any purpose of exact comparison, reveals, it will be noticed, one salient fact. Out of 755 English accidents, no less than 406 came under the head of collisions--whether head collisions, rear collisions, or collisions on sidings or at junctions. In other words, to collisions of some sort between trains were due considerably more than half (54 per cent.) of the accidents which took place in Great Britain, while only 88, or less than 13 per cent. of the whole, were due to derailments from all causes. In America on the other hand, while of the 3,763 accidents recorded, 1,324, or but one-third part (35 per cent.) were due to collisions, no less than 586, or 24 per cent., were classed under the head of derailments, due to defects in the permanent way. During the the six years 1873-8 there were in all 1698 cases of collision of every description between trains reported as occurring in America to 1495 in the United Kingdom; but while in America the derailments amounted to no less than 4016, or more than twice the collisions, in the United Kingdom they were but 817, or a little more than half their number. It has already been noticed that the most disastrous accidents in America are apt to occur on bridges, and Ashtabula and Tariffville at once suggest themselves. This is not the case in Great Britain. Under the heading of "Failures of Tunnels, Bridges, Viaducts or Culverts," there were returned in that country during the six years 1873-8 only 29 accidents in all; while during the same time in America, under the heads of broken bridges or tressels and open draws, the _Gazette_ recorded no less than 165. These figures curiously illustrate the different manner in which the railroads of the two countries have been constructed, and the different circumstances under which they are operated. The English collisions are distinctly traceable to constant overcrowding; the American derailments and bridge accidents to inferior construction of our road-beds.