Vol. II: XVIII. Naval Warfare. Mechanical Appliances. Music.: 1119.
The Da Vinci Notebooks
Diving apparatus and Skating (1119-1121).Of walking under water.
Method of walking on water.
277:623 : The two sketches belonging to this passage are given by AMORETTI, Memorie Storiche. Tav. II, Fig. 3 and 4.