This outline seems to show how easily the course of a storm is modified by the irregularities of surface, even when the obstacles are such as it can overcome. It is seen that the course of a small storm over broken country, little resembles the steady curve of the storm in the open sea. Ever and anon, the obstacles below momentarily break the regular current, which is as often renewed in a moment by the powerful upward suction in the upper air. This is the phenomenon known as “jumping,” which may be repeated till the widening of the center leaves the storm too weak to promptly restore the current at the ground, and the danger from the tornado is over. Some of the apparent eccentricities in the city, are doubtless due to the fact that occasional buildings were strong enough to resist; and leaving such at slight variations in its course, made it present the appearance of doubling on its track. So many blocks of buildings, great and small, in an instant violently hurled to pieces, would seem to infer with certainty the death of nearly all the occupants. That only about a hundred should have been killed outright, was therefore a matter of astonishment no less than of gratitude. The terror and anguish of the first moments or hours could not, however, be measured by the actual calamity to human life. Members of households suddenly separated from each other in the darkness, could only fear the worst. [Illustration: LOUISVILLE TORNADO--FALLS CITY HALL.] Their startled imagination saw the missing one dead or dying under the huge piles of fallen buildings. There were excited cries and calls and wailing of the living; a mad rush and frantic tugging at the ruins, from beneath which were sometimes heard shrieks for help or groans of the dying. To add to the universal terror, fires broke out in many places, threatening imprisoned wretches with a fate more horrible than the crush of falling walls, or timbers, bricks or iron, hurtling through the air. Before help could reach them the flames took hold on some and hushed their cries forever. Fortunately, the fire-alarm connections were left intact, and as alarm after alarm was sent, there was a dashing of the engines to the rescue, and the whole fire-department was presently engaged in extinguishing the flames, or recovering the living and the dead. Hospitals and morgues were suddenly improvised in sheds or shops, where the wounded were cared for, or the dead were deposited to await the recognition or claim of the living.