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The Notebooks of Leonardo Da Vinci
Contents:
136.
The middle of the light and shade on an object in light and shade is opposite to the middle of the primary light. All light and shadow expresses itself in pyramidal lines. The middle of the shadow on any object must necessarily be opposite the middle of its light, with a direct line passing through the centre of the body. The middle of the light will be at a, that of the shadow at b. [Again, in bodies shown in light and shade the middle of each must coincide with the centre of the body, and a straight line will pass through both and through that centre.]
[Footnote: In the original MS., at the spot marked a of the first diagram Leonardo wrote primitiuo, and at the spot marked c—primitiva (primary); at the spot marked b he wrote dirivatiuo and at d deriuatiua (derived).]
Contents:
Chicago: Leonardo da Vinci, "136.," The Notebooks of Leonardo Da Vinci, trans. Richter, Jean Paul, 1847-1937 in The Notebooks of Leonardo Da Vinci (New York: Dover Publications, Inc., 1970), Original Sources, accessed February 7, 2025, http://www.originalsources.com/Document.aspx?DocID=8FL7TTY9UT5ADDX.
MLA: Vinci, Leonardo da. "136." The Notebooks of Leonardo Da Vinci, translted by Richter, Jean Paul, 1847-1937, in The Notebooks of Leonardo Da Vinci, New York, Dover Publications, Inc., 1970, Original Sources. 7 Feb. 2025. http://www.originalsources.com/Document.aspx?DocID=8FL7TTY9UT5ADDX.
Harvard: Vinci, LD, '136.' in The Notebooks of Leonardo Da Vinci, trans. . cited in 1970, The Notebooks of Leonardo Da Vinci, Dover Publications, Inc., New York. Original Sources, retrieved 7 February 2025, from http://www.originalsources.com/Document.aspx?DocID=8FL7TTY9UT5ADDX.
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