Show why soldiers break there are very few bridges in the world over which troops are allowed to march in regular step in general when coming to a bridge particularly a BUS pension bridge the or bands are stopped the array is broken and the soldiers pass over without keeping step or rather taking pains not to keep step the reason is found in the fact that a very slight initial vibration if continued is imparted to the whole structure and 4 a short time becomes so strong a downward strain recurrence as speedily to endanger the safety af pf the strongest bridge the same principle is illustrated in some houses which can be made to tremble from roof to foundation by per and regularly pressing with the foot on a loose board in one of the floors A similar jc urious circumstance is seen in the case of certain churches in which fc is dangerous to play tho heavy pedal pipes of a grand organ for the reason that the vibration becomes so great as to chatter the pangs of glass in the window and even to imperil the safety of the roof st louis globe democrat sta one the gallows now used in colorado ia fo arranged that a spring ia set loose by the weight of the victim on the trap and he acts as his own executioner this eaves the sheriff or any one else acting sal hangman and no ones conscience is troubled if there any bungling detroit free press |