Point d placed on the perpendicular o b p
A construction within the lettered space n m r q, with hanging suspension diagrams
A brief note instructs the reader to place a point d freely on the perpendicular o b p and to set that perpendicular in the middle of the lettered space n m r q. Both leaves are dominated by large diagrams: bundles of vertical (perpendicular) lines dropping from a horizontal baseline and converging toward a raised apex above a shallow curved arc, in the manner of Leonardo's balance and centre-of-gravity studies. Only a single line of text was transcribed, but further faint notes are visible at the left margin of one leaf. The construction appears to continue the surrounding investigation of equilibrium.
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Placing point d on the perpendicular o b p
The note tells the reader to set the point d wherever they please upon the perpendicular o b p, and to place that perpendicular line in the middle of the space n m r q. It reads as the opening of a geometric construction whose figure occupies the leaf.
Perpendiculars converging over a shallow arc
Each leaf carries a row of parallel vertical lines dropping from a horizontal upper edge, with several of them drawn in to meet at a single raised apex above a shallow curved base. The arrangement resembles Leonardo's diagrams of suspended weights and the search for a body's centre of gravity, though no accompanying calculation was transcribed.