the gun-fire much valuable ace fred. It was learned that when Sound left the muzzle of the yun it took" a Zigantic curve upwards of about nine miles. This took about 35 seconds. From this height to bout the height of sixteen miles, the sound travelled upwards more slowly, but at about thirly miles it struck a warm ozone belt of air was deflected back to-earth, Sound travell-Ing close to the earth behaves differently; it is often quickly absorbed by trees and buildings soon dies away. TI is therefore quite possible for a town within a few miles of another Which Is being raided fo hear nothing at all of the explosions, while another town scores of millet away will hear the explosions distinctly. Needless to say the experiments of this nature which have been made are bearing fruit today the spotter apparatus now being used.
Text read from the printed page and cleaned; old type leaves the occasional error.