1406.
The road of Messer Mariolo is 13 1/4 braccia wide; the House of
Evangelista is 75.
It enters 7 1/2 braccia in the house of Mariolo. [Footnote: On this page and that which faces it, MS.I2 7la, are two diagrams with numerous reference numbers, evidently relating to the measurements of a street.]
1407.
I ask at what part of its curved motion the moving cause will leave the thing moved and moveable.
Speak to Pietro Monti of these methods of throwing spears.
1408.
Antonio de' Risi is at the council of Justice.
1409.
Paolo said that no machine that moves another …. [Footnote: The passage, of which the beginning is here given, deals with questions in mechanics. The instances in which Leonardo quotes the opinions of his contemporaries on scientific matters are so rare as to be worth noticing. Compare No. 901. ]