The Notebooks of Leonardo Da Vinci Complete


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wind notwithstanding that the wind itself is not visible in the air.  
To this I must answer that it is not the motion of the wind but only  
the motion of the things carried along by it which is seen in the  
air.  
THE DIVISIONS. [Footnote 76: These observations, added at the bottom  
of the page containing the full description of the doluge seem to  
indicate that it was Leonardo's intention to elaborate the subject  
still farther in a separate treatise.]  
Darkness, wind, tempest at sea, floods of water, forests on fire,  
rain, bolts from heaven, earthquakes and ruins of mountains,  
overthrow of cities [Footnote 81: Spianamenti di citta (overthrow  
of cities). A considerable number of drawings in black chalk, at  
Windsor, illustrate this catastrophe. Most of them are much rubbed;  
one of the least injured is reproduced at Pl. XXXIX. Compare also  
the pen and ink sketch Pl. XXXVI.].  
Whirlwinds which carry water [spouts] branches of trees, and men  
through the air.  
Boughs stripped off by the winds, mingling by the meeting of the  
winds, with people upon them.  
Broken trees loaded with people.  
436  


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