Joule and Playfairs' experiment

Joule and Playfairs' experiment

[¦jül and ′plā‚fārz ik‚sper·ə·mənt]
(thermodynamics)
An experiment in which the temperature of the maximum density of water is measured by taking the mean of the temperatures of water in two columns whose densities are determined to be equal from the absence of correction currents in a connecting trough.