[The work of Hernandez and its repercussions in the natural sciences].

The most important source of knowledge and diffusion of the great American work from Hernández, was carried out starting from the selection and summary produced by the Napolitan physician Nardo Antonio Recchi. Starting from his manuscript they published the Rerum Medicarum Novai Hispaniae Thesaurus (Rome 1651), piece prepared by the Accademia dei Lincei, and the four Books of Nature (Mexico, 1615), carried out by Brother Francisco Ximénez with the intention--intention that also had Recchi--of having a practical handbook of medicine utilizing the American products. This paper treats, essentially, of those works.