Semi-Annual Report - July 1947. Contract NOrd-7920, Task PRN-3 Open PDF Document Details Document Type Technical Report Publication Date Jul 01, 1947 Accession Number ADA952865 Entities Organizations Princeton University Tags Communities of Interest Energy and Power Technologies Weapons Technologies DTIC Thesaurus Topics Barometric Pressure Charged Particles Chemical Reaction Properties Chemical Synthesis Chemistry Combustion Detectors Ignition Ionization Measurement Physics Laboratories Pressure Measurement Resonant Circuits Resonant Frequency Spark Ignition Surface Finishing Tuned Circuits