The Notebooks of Leonardo Da Vinci Complete


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6
38.  
Note how aqua vitae absorbs into itself all the colours and smells  
of flowers. If you want to make blue put iris flowers into it and  
for red solanum berries (?)  
6
39.  
Salt may be made from human excrement burnt and calcined and made  
into lees, and dried by a slow fire, and all dung in like manner  
yields salt, and these salts when distilled are very pungent.  
6
40.  
Sea water filtered through mud or clay, leaves all its saltness in  
it. Woollen stuffs placed on board ship absorb fresh water. If sea  
water is distilled under a retort it becomes of the first excellence  
and any one who has a little stove in his kitchen can, with the same  
wood as he cooks with, distil a great quantity of water if the  
retort is a large one.  
6
41.  
MOULD(?).  
The mould (?) may be of Venus, or of Jupiter and Saturn and placed  
456  


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