<title> SUMMARY </title>Luigi Valentino Brugnatelli (1761-1818), was the first Italian chemist who tried to organize systematically the diffusion of chemical ideas in Italy. And even if his works were theorethically weak, his function as editor and journalist gave a strong impulse to the birth of this science.Therefore an extend study of his unpublished letters and manuscripts should lead to a better comprehension of the Italian scientific organisation after the chemical revolution.
title SUMMARY /title Italian chemistry in the second half of eighteenth century was strongly characterized by ambivalence. On the one hand there were the experimental and technical contributions by Landriani, Fontana, Volta, Spallanzani, Giobert, and many others, who immediately contributed original results to the debate on gases which was going on between English and French chemists. On the other hand there was a lack of interest from the same scientists for the theoretical and methodological issues of the controversy between Lavoisier and Priestley. It was this lack of interest, due to their opposition to the abstract and philosophical aspects of chemistry, that cut off the italian chemists from the theoretical debate.