AN UNSINKABLE TITANIC
tin whistle, and allowed the whole bridge to fall into the St. Lawrence, carrying eighty men to their death! The disaster was traced to a very insignificant cause the failure of some small angle-bars, 3 1-2 inches in width, by which the parts of the massive member were held in place. No engineer had suspected that danger lurked in these little angle-bars. Had the accident happened to a bridge of moderate size, the lessons of the failure would have been noted by the engineers and contractors; it would have formed the subject, possibly, of a paper before some engineering society, and the warning would have had results merely local and temporary. But the failure of this monumental structure, with a loss of life so appalling, gave to the disaster a world-wide notoriety. It became the subject of a searching enquiry by a highly expert board; the unsuspected danger which lurked in the existing and generally approved methods of building up massive steel columns was acknowledged; and safer rules of construction were adopted.
It took the Baltimore conflagration to teach us the strong and weak points of our much-vaunted systems of fireproof construction.
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