Firearms Identification--Ballistics

Judicial tribunals usually exercise considerable caution regarding the admissibility into evidence of expert testimony concerning some new phase of our ever increasing wealth of scientific knowledge. In certain instances this attitude has led courts of justice to reach apparently absurd results. The scientist occasionally reads with scorn the judicial denunciation of, or the refusal to consider, the application of a scientific principle or instrumentality. Yet the conscientious scientific investigator himself exhibits the same degree of caution, if not more, whenever there appears the announcement of some alleged discovery or invention.