In recent years attempts have been made to use infrared radiation (invisible vibration longer in wave length than visible light) to help fog-wrapped ships at sea. Some time ago Master Mariner Flavel M. Williams experimented with infrared cameras on two U. S. ships. The alert head of Pennsylvania's State police, Commissioner Percy W. Foote, decided that infrared radiation could be utilized on land as well as on sea, asked Flavel M. Williams to help him put it to work catching traffic law violators.
It is sometimes difficult or impossible for police in patrol cars...
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