Catechism, a literary genre of a religious origin, was once employed in the teaching of ‘lay’ subjects, especially of a technical nature. This is a review of this past editorial tradition which illustrates the potentialities and the limitations of agrarian catechisms, with a special focus on their spreading across Southern Italy in the late Enlightenment. This paper reflects on whether a book was the best instrument to hand down procedures and notions to people who supposedly were illiterate or unschooled.

Florence's La Specola Museum stirs up strong emotions. Among its collections, the valuable anatomical wax models created between the end of 17th and the beginning of 18th century stand out owing to their marvellous and provocative nature. The aim of this essay is to analyse the communication models epitomised by some of these works by means of historical semiotics, to nourish the widespread, but often underestimated assumption that science and the means used to spread it have always been influenced by intellectual suppositions and constantly interact with contemporary culture.