An extensive, Latin-language treatise on natural philosophy written by the French savant and Professor of Philosophy at the Sorbonne, Joseph François Marie in 1763-1764. Some chapters in the work appear to have minor lacunae.

This manuscript was presented to the Société Royale des Sciences de Montpellier, and endorsed as being received by them on 8 October 1786, for a prize in physics which the society was sponsoring on the question if the Newtonian explanation of rainbows was incontestable. Flaugergues' presentation won the prize. Included are numerous geometrical and other types of sketches.