Page:Popular Science Monthly Volume 89.djvu/224

 What Chemical Energy Can Do

�����The crater, shown above, is not at the summit of an extinct volcano. It is a pit dug in a moment's time by the explosion of a French mine, completely obliterating a German trench. Below is shown the bursting of a star-shell — a fair sample of the costly illumination at the British western front every night. Such pyro- technics may appeal to the artistic eye of the non-combatant but to the soldier they mean but one thing — a night of terror

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