 From 1775 to 1780 he travelled through Europe.Already in 1775 he published a treatise, 'Ricerche fisiche sopra l'aria fissa', on Carbon dioxide (opposing to, among others, the theory of Torbern Bergman that it was acid in itself) and 1779-1780 sees his seminal research on curare.In 1779 he offers the London Royal Society two memories on chemistry