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By means of a hammer, m, a smart blow is given the valve i, and this detonates the priming, and causes an explosion of the charge. The gases make their exit through the pyramid, h, and lift the valve and press it against the plug, so that their escape is effectually prevented. In fact, the explosion takes place without noise.
Red-gravel paths have been replaced by brick sidewalks; huge buildings rise before the eye; electric cars whiz in every direction; a tall, bristling iron fence surrounds the college yard; and an enormous clock on the tower of Memorial Hall detonates the hours in a manner which is by no means conducive to the sleep of the just and the rest of the weary.
"I see; you mean that it goes off quickly," said my mother, in a simple way that was eminently characteristic. "Well, yes; but much more quickly than gunpowder does. It were better to say that a powder detonates when it all explodes at the same instant. Gunpowder appears to do so, but in reality it does not. One of the best detonators is fulminate of mercury.
"You've got a protection against the terror beam," said the general matter-of-factly. "So have we. But ours weighs two tons. Yours can be carried without being a burden. And " his eyes went to the unlikely cheese grater over Lockley's shoulder "and yours detonates explosives. If we can equip the world with those, Lockley, we'll have peace!" Lockley thought of a decisive test. He grimaced.
"I don't like the looks of things, sir," replied that officer. "She ain't flyin' any dynamite flag, an' if she was an' had a hold full there wouldn't be any particular danger to us, an' anyone that has ever shipped dynamite would know it, or ought to. It's not fire that detonates dynamite, it's concussion. No sir, Mr. Harding, there's something queer here I don't like the looks of it.
Lennon smiled at her ignorance of explosives. "The stones will double the destruction. After that charge detonates, there will be a hole in the floor, a good deal of shattered stone, and some splinters and shreds of metal. Everything in the room will be smashed. Is that satisfactory?" Carmena shuddered as if seized with a fever chill, but pulled herself together. "All right. We'll go now."
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