In the Novum Organum, after giving a long list of the sources of heat, he says: "From these examples, taken collectively as well as singly, the nature whose limit is heat appears to be motion..
They formed a new path to Heaven, to tread where no one had tread before.
As such a novum salutis genus, the Crusades connect themselves with the history of the penitentiary system; as the foreign policy of the Church they belong to that clerical purification and direction of feudal society and its instincts, which appears in the institution of "God's Truce" and in chivalry itself.
Farlatus and others, Illyricum Sacrum (Venice, 1751-1819); C. du Fresne du Cange, Illyricum vetus et novum (1746); M.
Auenbrugger's great work, the Inventum novum, was published in 1761.