Constant volume thermometry According to Preston (1894/1904), Regnault found constant pressure air thermometers unsatisfactory, because they needed troublesome corrections. He therefore built a constant volume air thermometer.Preston, T. (1894/1904). The Theory of Heat, second edition, revised by J.R. Cotter, Macmillan, London, Section 92.0 Constant volume thermometers do not provide a way to avoid the problem of anomalous behaviour like that of water at approximately 4 °C.
Constant volume thermometry According to Preston (1894/1904), Regnault found constant pressure air thermometer:s unsatisfactory, because they nee?ded troublesome corrections. He therefore built a constant volume air thermometer.Preston, T. (1894/1904). The Theory of Heat, second edition, revised by J.R. Cotter, Macmillan, London, Section 92.0 Constant volume thermometers do not provide a way to avoid the problem of anomalous behaviour like that :of water at approximately 4 °C.