P. Joule had assumed to be the same at all temperatures.
P. Joule found that magnetization did not increase proportionately with the current, but reached a maximum (Sturgeon's Annals of Electricity, 1839, 4).
P. Joule respectively, and the author of the first formal treatise on the subject.
Method of Joule and Thomson.
As the result of their experiments on actual gases (air, hydrogen, and C02), Joule and Thomson (Phil.