A machine was constructed and installed for testing the mechanical properties of materials down to liquid helium temperatures. The facility is designed to perform static and dynamic measurements, and is rigid and fast enough to measure the work of fracture or other fast running processes. The parameters of the machine are so selected that plastics, resins, etc. can be tested, but it may also be adapted to the measurement of electrical or thermal properties of conductors (superconductors) under static or dynamic load. Some results of measurements on unfilled and filled resins are included.
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