VENI VIDI DA VINCI

Collections Newsletter Guild About Developers Patron Sign In

Library/Paris Manuscript I/178

Prev178 / 293Next

Paris Manuscript I — 178

100%

Reset zoom

Bibliothèque de l'Institut de France, Paris

I2 35 v.

Dove il fiume si ristrigne, sarà scorticato il fondo della sua terra e lasciati i sassi o 'l tufo discoperto del suo terreno.

Dove il fiume si rallarga, sara[n] posate le pietre piccole e la rena.

Dove il fiume forte sarà allargato, ivi scaricherà il fango o lita e legname, e altre cose lieve.

Dove più corsi d'acque concorrano, sarà fatta subita concavità navale1.

Dove l'acque si disgregano, sarà posata rena e lita e alzato il fondo in figura di mezza nave sottosopra.

Sotto i balzi dell'acqua si farà colli di rena o pietre. Sotto le percussioni si leverà ciò che sotto il balzo si ripone.

Dove l'acqua truova più alto e la[r]go ostaculo sotto di sé, ivi fa maggiore onda e più alta, e poi più bassa cava.

Where a river scours and where it deposits

Where the river narrows, the bottom of its bed will be scoured and the stones or the tufa of its ground left uncovered.

Where the river widens again, the small stones and the sand will be laid down.

Where the river is greatly widened, there it will unload the mud or silt and timber, and other light things.

Where several water-courses come together, a sudden boat-shaped hollow will be made.

Where the waters spread apart, sand and silt will be deposited, and the bottom raised in the shape of half a boat turned upside down.

Beneath the leaps of the water, mounds of sand or stones will form. Beneath the impacts, whatever is laid down beneath the leap will be lifted away.

Where the water finds a higher and wider obstacle beneath it, there it makes a greater and higher wave, and then a lower hollow.

How a river scours and deposits along its bed

Narrows, widenings, confluences and standing waves

Hydraulics Geology

In a series of short propositions Leonardo maps where a river erodes and where it deposits: where it narrows the bed is scoured down to bare stone or tufa, where it widens it drops small stones and sand, and where it broadens greatly it unloads mud, silt and floating timber. Where several currents meet, a sudden boat-shaped hollow forms, and where waters spread apart the bed rises like an upturned half-hull. He adds that mounds of sand or stone gather beneath water-leaps, and that a high, broad obstacle on the bottom raises a greater wave followed by a deeper hollow.

On this page

Scour at narrows, deposition at widenings

Where the river narrows its bed is scoured to bare stone or tufa; where it widens, small stones and sand are laid down; where it broadens greatly, mud, silt and timber are dropped. Deposition and erosion follow the local speed of the current.

Boat-shaped hollows and raised beds

Where several currents meet, a sudden hollow shaped like a ship's hull is scoured; where the waters spread apart, sand and silt raise the bed like an upturned half-boat. Mounds of sand or stone build beneath the leaps of the water, and a high, broad obstacle raises a greater wave and a deeper hollow.

Reader's Edition — described with AI from the e-Leo transcription.