From 1845 to 1854 this enigmatically titled work was pubished under the title, Nouvelle encyclographie des sciences médicales.  Rather than an encyclopedia, it was a series of reprints of books and periodicals to which physicians in Belgium subscribed, sometimes reproducing elaborately illustrated works, such as Cruveilhier's atlas of pathology. It was neither an encyclopedia nor a periodical in the conventional sense. The list of volumes and links to digital facsimiles are available from Universiteits Bibliotheek Gent at this link.