The birth of Leonardo / Costantino Baroni, Ignazio Calvi -- The portrait of Leonardo / Giorgio Nicodemi -- The life and works of Leonardo / Giorgio Nicodemi -- The drawings of Leonardo / Adolfo Venturi -- Leonardo in Florence and Tuscany / Nello Tarchiani -- Leonardo in Milan and Lombardy / Alessandro Visconti -- Leonardo in Rome / Emilio Lavagnino -- Leonardo in Venice / Diego Valeri -- Leonardo in France / Leopoldo Mobilleau -- Leonardo's manuscripts / Enrico Carusi -- Leonardo's thought / Giovanni Gentile -- Studying Leonardo / Fausto M. Bongioanni -- Leonardo in Belgium / Pietro Bautier -- Leonardo in England / Tancred Borenius -- Leonardo in Germany / Gert Adriani -- The mathematics of Leonardo / Umberto Cisotti -- Da Vinci's astronomy / Pio Emanuelli -- The physics of Da Vinci / Sebastiano Timpanaro -- Da Vinci's philology / Augusto Marinoni -- Da Vinci's music / Enrico Magni-Dufflocq -- Dome architecture / Gino Chierici -- Leonardo as architect / Costantino Baroni -- The science of structures / Arturo Uccelli -- Military engineering and arms / Ignazio Calvi -- Leonardo as decorator / Ambrogio Annoni -- The school of Leonardo / Guglielmo Suida -- The flight of birds / Francesco Cutry -- Codex on the flight of birds / Sandro Piantanida -- Anatomy and the biological sciences / Giuseppe Favaro -- Leonardo as physiologist / Filippo Bottazzi -- Comparative anatomy / Luigi Leinati -- Leonardo's work in phonetics and linguistics / G. Panconcelli-Calzia -- Leonardo's optics / Domenico Argentieri -- Anatomy in art / Carlo Felice Biaggi -- Da Vinci's botany / Antonio Baldacci -- Da Vinci's geology and geography / Federico Sacco -- Hydraulic and nautical engineering / Carlo Zammattio -- Da Vinci's mechanics / Roberto Marcolongo -- Leonardo's machines / Giovanni Canestrini -- The Madrid manuscripts of Leonardo / Marco Rosci -- Bibliographical note / Constantino Baroni.