The four elements weighed, with number tables and water chapters

Axioms on the gravity and levity of the elements

Each element has gravity or levity only outside its own element, greater or less as the surrounding element is lighter or heavier. No element receives or retains the element above or below it without the aid of a third. Adding light to light makes greater levity, heavy to heavy greater gravity, and joining heavy with light destroys both.

Section through the elemental spheres

A figure of the elemental spheres labelled Foco, Aria, Acqua, Terra (fire, air, water, earth) with rules: fire in air wants the aid of water; water in fire has no place; earth in water wants the aid of air; earth in fire is nothing. The letter a marks the penultimate sphere, said to gain two degrees of levity and one of gravity.

Columns of squares and cubes

A block of computed figures set transversely on the sheet, chains of multiplications running from small numbers up to values in the tens and hundreds of thousands, related to Leonardo's comparisons of square and cube roots.

Further chapters on the percussion of water

The right side extends the book on water: the power of water impeded in its course; impacts of water descending by curved lines, in stair-like steps, and through conduits, spouts and tapering channels; and water interrupted by the blades of mill wheels turning uprightly or flat.

Circle divided into four quadrants

At the bottom a circle is divided into four quadrants, annotated "Igna, in 4 pieces" — a division of the figure into equal parts.

Foglio 214 a Verso

Margine superiore:

Margine destro:

Figura di una sezione delle sfere elementari:

Nello spazio sotto la colonna centrale:

Traversalmente:

Andando verso sinistra:

Nel margine sinistro:

In basso. Cerchio diviso in quattro quadranti:

Traversalmente:

Foglio 214 b Verso

A destra:

A sinistra:

Sheet 214a Verso

Upper margin:

Right margin:

Figure of a section of the elemental spheres:

In the space beneath the central column:

Transversely:

Going toward the left:

In the left margin:

At the bottom. A circle divided into four quadrants:

Transversely:

Sheet 214b Verso

On the right:

On the left: