Fol. 4r

More weights, placed on different planes and subject to different forces. Leonardo goes more deeply into the themes of the previous page.

«Il peso "q" a causa dell'angolo retto "n", sopra "d" "f" nel punto "e", pesa due terzi del suo peso naturale, che era di tre libbre, che diventerà due libbre; e il peso "p", che era anch'esso di tre libbre, diventa di una libbra, a causa di un rettangolo sulla linea "h" "d" nel punto "g"…»
(Weight q, because of right angle n, above d f at point e weighs two-thirds of its natural weight, which was three pounds and becomes two pounds; and weight p, which was also three pounds, becomes one pound, because of a right angle on line h d at point g.)

NOTE. For each page of Leonardo’s Codex we provide a brief summary, with the quotation of one that page’s most significant passages edited in modern Italian, with an English translation.

translation by Kim Williams