Leonardo da Vinci, Pathfinder of Science
_Index_                                      A   Abbaco, Benedetto dell', 5   Adda river, 124   "Adoration of the Magi," 29, 30   Adriatic, the, 62, 93   "Air conditioner," 69   Air, study of, 65, 66, 99   "Alarm clock," 57   Albert of Saxony, 81   Alessandria, fortress of, 83   Alfonso of Calabria, 38   Alps, the, 37, 67   Amadeo, Antonio, 58   Amadori, Albiera di Giovanni, 2   Amadori, Alessandro, 3, 111   Amboise, _see_