The application of physiology to the explanation of diseases, and thus to practice, was chiefly by the theory of the temperaments or mixtures which Galen founded upon the Hippocratic doctrine of humours, but developed with marvellous and fatal ingenuity.
The governors put in office at this time by the crown were not of conciliatory temperaments, and the measures instituted in parliament (see United States) served to increase bitterness of feeling.
Taken together as a group, they have been supposed to be three out of an uncompleted series designed to illustrate the four "temperaments" and complexions of men.
It rested on a solid basis of mutual affection and of common studies, the different temperaments of the two scholars securing them against the disagreements of rivalry or jealousy.
But under fortune not only political and geographical conditions but the characters and temperaments of nations and individuals play their part.