Here is the translation of what Leonardo da Vinci annotated around his drawing in mirror writing:
"Vitruvius says, in his work on architecture: Nature has distributed the measurements of the human body like this:
Four fingers make a palm, and four palms make a foot, six palms make an elbow: four elbows make the height of a man. And four elbows make a double step, and twenty-four palms make a man; and he used these measures in his constructions. See more
If you open your legs so as to lower your height by one fourteenth, and if you extend your arms so that the tips of your fingers are at the top of your head, you must know that the centre of your extended limbs will be at the navel, and the space between your legs will be an equilateral triangle.
The length of a man's outstretched arms is equal to his height.
From the hairline to the bottom of the chin, there is one tenth the height of a man. From the bottom of the chin to the top of the head, an eighth. From the top of the chest to the top of the head, a sixth; from the top of the chest to the hairline, a seventh.
From the nipples to the top of the head, a quarter of the man's height. The greatest width of the shoulders is contained within a quarter of a man's height. From the elbow to the tip of the hand, a quarter. From the elbow to the armpit, one eighth.
The whole hand is one tenth of a man. The birth of the manly limb is in the middle. The foot is a seventh of the human being. From the sole of the foot to below the knee, a quarter of a man. From below the knee to the beginning of the genitals, a quarter of a man.
The distance from the bottom of the chin to the nose, and from the roots of the hair to the eyebrows is the same, as is the ear: one third of the face.
About L. DA VINCI
Leonardo da Vinci was born on 15 April 1452. He was the son of a notary and a peasant woman who never married.
In 1466, he began working in the workshop of a sculptor named Andrea del Verrocchio. It was here that he began to paint, sculpt and draw.
Leonardo da Vinci became a painter, sculptor, engineer, inventor, musician, writer and architect, and was considered a great genius. He was always very interested in anatomical studies of the human body and could draw human organs in great detail. See more
He was accepted into the painters' guild in Florence in 1472 and opened his own painting and sculpture studio. His fame began to grow and he was commissioned to produce many different and very important works.
Throughout his life, he was in the service of several dukes who commissioned sculptures and paintings from him, but what really interested him was inventing new vehicles, weapons and objects.
All the works of Leonardo da Vinci are known, but the most famous are: the painting of "The Last Supper", which he painted on a fresco in the monastery of Santa Maria delle Grazie in Milan; "La Gioconda", better known as "La Monna Lisa"; and "Vitruvian Man", a famous drawing of a man with four arms and four legs, in which he attempted to study the human body.
He also made many sculptures, but none of them have survived to the present day.
Although he was always creating and building new works, the struggles that took place during his life, as well as the struggles and rebellions that took place after his death, are responsible for the fact that many of his creations were destroyed, burnt or lost, including his remains that were thrown away in an unknown place after a war.
He died on 2 May 1519 in France.