Weights on cords: end-loads follow the ratio of the angles
Equal weights, equal angles at n; plus a second suspended-rod sketch
A weighted box hangs from cords meeting at n above a graduated arc, with a second, simpler weighted rod sketched below. Leonardo states that the ends of a cord receive the attached weight in the same proportion the angles a n b and b n c bear to one another; since the weights here are equal (4 and 4/6 on each side), the two angles meeting at n are found equal too. The page is headed as confirmed by experiment.
On this page
The cord-ends share the load in the proportion of the two angles at n
Whatever proportion the angles a n b and b n c have between themselves, in that proportion the ends of the cord receive the weight attached to it. Because the weights here are equal, that is 4 and 4/6 against 4 and 4/6, the two angles meeting at n are likewise found equal.
A second suspended rod with a hung weight
Below the text a simpler beam is drawn with a weight box hung from a cord, lettered with the values 4 8 - 6. It repeats in reduced form the suspended-rod arrangement treated above.