Hy= droidea seu Lep- ' 't011nae.
After his death Pibrac, assisted by De Thou and Scevole de Sainte-Marthe, collected a volume of the Poemata of L'Hopital, and in 1585 his grandson published Epistolarum seu Sermonum libri sex.
He wrote (1) Antapodoseos, seu rerum per Europem gestarum, Libri VI, an historical narrative, relating to the events from 887 to 949, compiled with the object of avenging himself upon Berengar and Willa his queen; (2) Historia Ottonis, a work of greater impartiality and merit, unfortunately covering only the years from 960 to 964; and (3) the Relatio de Legatione Constantinopolitana (968-969).
The following year, the question of the intervention of kings in the election of bishops having been raised in a pamphlet by Charles Hersent (Optatus Gallus de cavendo schismate, 1640), Marca defended what were then called the liberties of the Gallican Church, in his celebrated treatise De concordia sacerdotii et imperii, seu de libertatibus ecclesiae gallicanae (1641).
Of the greatest importance is the alcoholic fermentation brought about by yeast cells (Saccharomyces cerevisiae seu vini); this follows the equation CH120 6 =2C 2 H 6 0+2CO 2, Pasteur considering 94 to 95% of the sugar to be so changed.