PARDIES, Ignace Gaston. Discours du mouvement local. Avec des remarques sur le Mouvement de la Lumière. 1674.

Second enlarged edition.
Pardies was at the heart of the debates concerning the nature of light, corresponding with Newton, Leibniz, and Huygens. Before Huygens, he was the first to propose a detailed and well-argued theory based on the wave nature of light.
In 1670, Pardies sent a draft of his "discours sur le mouvement d’ondulation" to Huygens. This treatise was, for the Dutch scholar, who acknowledged it, an important source of inspiration in his conception of light, which he published much later, in 1690.
Pardies died on April 21, 1673, at the age of 36, from a fever contracted while visiting the sick at the Bicêtre hospice. His work on optics is known only indirectly, through the commentaries of his colleagues, but especially through the publication in 1682 by the Jesuit Father Pierre Ango of the work "Optics," inspired by the papers of Pardies that he had in his possession.
This second edition of his "Discourse on Local Movement" is interesting because it is expanded (compared to the first of 1670) with "Remarks on a letter from Mr. Descartes concerning light," in which, on p. 174, he hypothesizes that a sound would form in the sun and that the wave thus created would be transported to Earth.