647

On chemical materials.

Put marcasite into aqua fortis and if it turns green, know that it has copper in it. Take it out with saltpetre and soft soap.

Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.

646 * 648

VII * X

Notebooks of Leonoardo da Vinci

VIII: Botany for Painters and Elements of Landscape Painting.

. . .

627

Of preparing the panel.

628

The preparation of oils.

629,

630,

631,

632,

633,

634

On varnishes [or powders].

635,

636,

637

On chemical materials.

638,

639,

640,

641,

642,

643,

644,

645,

646,

647,

648,

649,

650

The relation of art and nature.

651,

652

Painting is superior to poetry.

653,

654

Painting is superior to sculpture.

655,

656

Aphorisms.

657,

658,

659

On the history of painting.

660,

661

The painter’s scope.

662

. . .