The Notebooks of Leonardo Da Vinci Complete


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Therefore we may say that the spirit cannot produce a voice without  
movement of the air, and air in it there is none, nor can it emit  
what it has not; and if desires to move that air in which it is  
incorporated, it is necessary that the spirit should multiply  
itself, and that cannot multiply which has no quantity. And in the  
4th place it is said that no rare body can move, if it has not a  
stable spot, whence it may take its motion; much more is it so when  
an element has to move within its own element, which does not move  
of itself, excepting by uniform evaporation at the centre of the  
thing evaporated; as occurs in a sponge squeezed in the hand held  
under water; the water escapes in every direction with equal  
movement through the openings between the fingers of the hand in  
which it is squeezed.  
As to whether the spirit has an articulate voice, and whether the  
spirit can be heard, and what hearing is, and seeing; the wave of  
the voice passes through the air as the images of objects pass to  
the eye.  
Nonentity.  
1
216.  
Every quantity is intellectually conceivable as infinitely  
divisible.  
948  


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