title: An isothermal twin calorimeter for the determination of the heat defect of low energy x-rays.
mesh_terms: D002151:Calorimetry / Q000295:instrumentation*; D006358:Hot Temperature; D011827:Radiation; D011829:Radiation Dosage; D012542:Scattering, Radiation; D014894:Weights and Measures; D014965:X-Rays