A French chemist has suggested an ingenious and somewhat humorous burglar alarm. It consists of powdered iodine and ammonia. The iodine is first dusted over the floor, very little being necessary. A sufficient quantity of ammonia to moisten the powdec l is then sprinkled over it. This evaporates very quickly, leaving a substance —iodine nitrate—which will explode or detonate at the slightest touch. Even a rat run- ; r.ing across the floor will set up a series ■of tiny explosions. The unsuspecting i burglar, thoujrh he tread as lightly as jhe can in the softest of felt slippers, will | think he is walking over bunches oi I Chinese crackers, and Trill arouse Ut-j •ntixe household.
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Bibliographic details
Auckland Star, Volume LIII, Issue 3, 5 January 1922, Page 2
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114Untitled Auckland Star, Volume LIII, Issue 3, 5 January 1922, Page 2
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