The Notebooks of Leonardo Da Vinci Complete


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5
11.  
The different kinds of light afforded in cellars by various forms of  
windows. The least useful and the coldest is the window at a. The  
most useful, the lightest and warmest and most open to the sky is  
the window at b. The window at c is of medium utility.  
[Footnote: From a reference to the notes on the right light for  
painting it becomes evident that the observations made on  
cellar-windows have a direct bearing on the construction of the  
studio-window. In the diagram b as well as in that under No. 510  
the window-opening is reduced to a minimum, but only, it would seem,  
in order to emphasize the advantage of walls constructed on the plan  
there shown.]  
5
12.  
OF THE PAINTER'S WINDOW AND ITS ADVANTAGE.  
The painter who works from nature should have a window, which he can  
raise and lower. The reason is that sometimes you will want to  
finish a thing you are drawing, close to the light.  
Let a b c d be the chest on which the work may be raised or  
lowered, so that the work moves up and down and not the painter. And  
every evening you can let down the work and shut it up above so that  
363  


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