A review of the progress of those constructive arts which affect the safety of human life seems to show that it needs the spur of great disasters, such as this, to concentrate the attention of the engineer and the architect upon the all-important question of safety. More important than considerations of convenience, economy, speed of construction, or even revenue-earning capacity, are those of the value and sanctity of human life. Too frequently these considerations are the last to receive attention. This is due less to indifference than to inadvertence--a failure to remember that an accident which may be insignificant in its effect on steel and stone, may be fatal to frail flesh and blood. Furthermore, the monumental disasters, and particularly those occurring in this age of great constructive works, are frequently traceable to hidden or unsuspected causes, the existence and potentialities of which are revealed only when the mischief has been done. A faulty method of construction, containing in itself huge possibilities of disaster, may be persisted in for years without revealing its lurking menace. Here and there, now and then, some minor mischance will direct the attention of the few to the peril; but the excitement will be local and passing. It takes a "horror"--a "holocaust" of human life, with all its attendant exploitation in the press and the monthly magazine, to awaken a busy and preoccupied world to the danger and beget those stringent laws and improved constructions which are the earmarks of progress towards an ideal civilisation. [Illustration: Courtesy of _Scientific American_. Note how far the _Great Eastern_ was ahead of her time. She was not exceeded until the advent of the _Oceanic_ in 1899. GROWTH OF THE TRANSATLANTIC STEAMER FROM 1840 TO 1912]