The Notebooks of Leonardo Da Vinci (29 page)

But, when the eye is between the cloud and the sun, the cloud has
the contrary effect to the former, for the edges of its mass are
dark and it is light towards the middle; and this happens because
you see the same side as faces the sun, and because the edges have
some transparency and reveal to the eye that portion which is hidden
beyond them, and which, as it does not catch the sunlight like that
portion turned towards it, is necessarily somewhat darker. Again, it
may be that you see the details of these rounded masses from the
lower side, while the sun shines on the upper side and as they are
not so situated as to reflect the light of the sun, as in the first
instance they remain dark.

The black clouds which are often seen higher up than those which are
illuminated by the sun are shaded by other clouds, lying between
them and the sun.

Again, the rounded forms of the clouds that face the sun, show their
edges dark because they lie against the light background; and to see
that this is true, you may look at the top of any cloud that is
wholly light because it lies against the blue of the atmosphere,
which is darker than the cloud.

[Footnote: A drawing in red chalk from the Windsor collection (see
Pl. XXIX), representing a landscape with storm-clouds, may serve to
illustrate this section as well as the following one.]

477.

The clouds do not show their rounded forms excepting on the sides
which face the sun; on the others the roundness is imperceptible
because they are in the shade. [Footnote: The text of this chapter
is given in facsimile on Pls. XXXVI and XXXVII. The two halves of
the leaf form but one in the original. On the margin close to lines
4 and 5 is the note:
rossore d'aria inverso l'orizonte
—(of the
redness of the atmosphere near the horizon). The sketches on the
lower portion of the page will be spoken of in No. 668.]

If the sun is in the East and the clouds in the West, the eye placed
between the sun and the clouds sees the edges of the rounded forms
composing these clouds as dark, and the portions which are
surrounded by this dark [edge] are light. And this occurs because
the edges of the rounded forms of these clouds are turned towards
the upper or lateral sky, which is reflected in them.

Both the cloud and the tree display no roundness at all on their
shaded side.

On images reflected in water.

478.

Painters often deceive themselves, by representing water in which
they make the water reflect the objects seen by the man. But the
water reflects the object from one side and the man sees it from the
other; and it often happens that the painter sees an object from
below, and thus one and the same object is seen from hind part
before and upside down, because the water shows the image of the
object in one way, and the eye sees it in another.

Of rainbows and rain (479. 480).

479.

The colours in the middle of the rainbow mingle together.

The bow in itself is not in the rain nor in the eye that sees it;
though it is generated by the rain, the sun, and the eye. The
rainbow is always seen by the eye that is between the rain and the
body of the sun; hence if the sun is in the East and the rain is in
the West it will appear on the rain in the West.

480.

When the air is condensed into rain it would produce a vacuum if the
rest of the air did not prevent this by filling its place, as it
does with a violent rush; and this is the wind which rises in the
summer time, accompanied by heavy rain.

Of flower seeds.

481.

All the flowers which turn towards the sun perfect their seeds; but
not the others; that is to say those which get only the reflection
of the sun.

The Practice of Painting.

It is hardly necessary to offer any excuses for the division
carried out in the arrangement of the text into practical
suggestions and theoretical enquiries. It was evidently intended by
Leonardo himself as we conclude from incidental remarks in the MSS.
(for instance No
110_). The fact that this arrangement was never
carried out either in the old MS. copies or in any edition since, is
easily accounted for by the general disorder which results from the
provisional distribution of the various chapters in the old copies.
We have every reason to believe that the earliest copyists, in
distributing the materials collected by them, did not in the least
consider the order in which the original MS.lay before them._

It is evident that almost all the chapters which refer to the
calling and life of the painter—and which are here brought together
in the first section (Nos.
482-508_)—may be referred to two
distinct periods in Leonardo's life; most of them can be dated as
belonging to the year_ 1492
or to
1515.
At about this later time
Leonardo may have formed the project of completing his Libro della
Pittura, after an interval of some years, as it would seem, during
which his interest in the subject had fallen somewhat into the
background.

In the second section, which treats first of the artist's studio,
the construction of a suitable window forms the object of careful
investigations; the special importance attached to this by Leonardo
is sufficiently obvious. His theory of the incidence of light which
was fully discussed in a former part of this work, was to him by no
means of mere abstract value, but, being deduced, as he says, from
experience (or experiment) was required to prove its utility in
practice. Connected with this we find suggestions for the choice of
a light with practical hints as to sketching a picture and some
other precepts of a practical character which must come under
consideration in the course of completing the painting. In all this
I have followed the same principle of arrangement in the text as was
carried out in the Theory of Painting, thus the suggestions for the
Perspective of a picture, (Nos.
536-569_), are followed by the
theory of light and shade for the practical method of optics (Nos.
548—566
) and this by the practical precepts or the treatment of
aerial perspective (
567—570
)._

In the passage on Portrait and Figure Painting the principles of
painting as applied to a bust and head are separated and placed
first, since the advice to figure painters must have some connection
with the principles of the treatment of composition by which they
are followed.

But this arrangement of the text made it seem advisable not to pick
out the practical precepts as to the representation of trees and
landscape from the close connection in which they were originally
placed—unlike the rest of the practical precepts—with the theory
of this branch of the subject. They must therefore be sought under
the section entitled Botany for Painters.

As a supplement to the
Libro di Pittura
I have here added those
texts which treat of the Painter's materials,—as chalk, drawing
paper, colours and their preparation, of the management of oils and
varnishes; in the appendix are some notes on chemical substances.
Possibly some of these, if not all, may have stood in connection
with the preparation of colours. It is in the very nature of things
that Leonardo's incidental indications as to colours and the like
should be now-a-days extremely obscure and could only be explained
by professional experts—by them even in but few instances. It might
therefore have seemed advisable to reproduce exactly the original
text without offering any translation. The rendering here given is
merely an attempt to suggest what Leonardo's meaning may have been.

LOMAZZO tells us in his
Trattato dell'arte della Pittura, Scultura
ed Architettura (Milano 1584, libro II, Cap. XIV): "Va discorrendo
ed argomentando Leonardo Vinci in un suo libro letto da me (?)
questi anni passati, ch'egli scrisse di mano stanca ai prieghi di
LUDOVICO SFORZA duca di Milano, in determinazione di questa
questione, se e piu nobile la pittura o la scultura; dicendo che
quanto piu un'arte porta seco fatica di corpo, e sudore, tanto piu e
vile, e men pregiata".
But the existence of any book specially
written for Lodovico il Moro on the superiority of Painting over
sculpture is perhaps mythical. The various passages in praise of
Painting as compared not merely with Sculpture but with Poetry, are
scattered among MSS. of very different dates.

Besides, the way, in which the subject is discussed appears not to
support the supposition, that these texts were prepared at a special
request of the Duke.

How to ascertain the dispositions for an artistic career.

482.

Many are they who have a taste and love for drawing, but no talent;
and this will be discernible in boys who are not diligent and never
finish their drawings with shading.

The course of instruction for an artist (483-485).

483.

The youth should first learn perspective, then the proportions of
objects. Then he may copy from some good master, to accustom himself
to fine forms. Then from nature, to confirm by practice the rules he
has learnt. Then see for a time the works of various masters. Then
get the habit of putting his art into practice and work.

[Footnote: The Vatican copy and numerous abridgements all place this
chapter at the beginning of the
Trattato
, and in consequence
DUFRESNE and all subsequent editors have done the same. In the
Vatican copy however all the general considerations on the relation
of painting to the other arts are placed first, as introductory.]

484.

First draw from drawings by good masters done from works of art and
from nature, and not from memory; then from plastic work, with the
guidance of the drawing done from it; and then from good natural
models and this you must put into practice.

485.

The artist ought first to exercise his hand by copying drawings from
the hand of a good master. And having acquired that practice, under
the criticism of his master, he should next practise drawing objects
in relief of a good style, following the rules which will presently
be given.

The study of the antique (486. 487).

486.

Which is best, to draw from nature or from the antique? and which is
more difficult to do outlines or light and shade?

487.

It is better to imitate [copy] the antique than modern work.

[Footnote 486, 487: These are the only two passages in which
Leonardo alludes to the importance of antique art in the training of
an artist. The question asked in No. 486 remains unanswered by him
and it seems to me very doubtful whether the opinion stated in No.
487 is to be regarded as a reply to it. This opinion stands in the
MS. in a connection—as will be explained later on—which seems to
require us to limit its application to a single special case. At any
rate we may suspect that when Leonardo put the question, he felt
some hesitation as to the answer. Among his very numerous drawings I
have not been able to find a single study from the antique, though a
drawing in black chalk, at Windsor, of a man on horseback (PI.
LXXIII) may perhaps be a reminiscence of the statue of Marcus
Aurelius at Rome. It seems to me that the drapery in a pen and ink
drawing of a bust, also at Windsor, has been borrowed from an
antique model (Pl. XXX). G. G. Rossi has, I believe, correctly
interpreted Leonardo's feeling towards the antique in the following
note on this passage in manzi's edition, p. 501: "Sappiamo dalla
storia, che i valorosi artisti Toscani dell'et� dell'oro dell'arte
studiarono sugli antichi marmi raccolti dal Magnifico LORENZO DE'
MEDICI. Pare che il Vinci a tali monumenti non si accostasse. Quest'
uomo sempre riconosce per maestra la natura, e questo principio lo
stringeva alla sola imitazione d� essa"—Compare No. 10, 26—28
footnote.]

The necessity of anatomical knowledge (488. 489).

488.

It is indispensable to a Painter who would be thoroughly familiar
with the limbs in all the positions and actions of which they are
capable, in the nude, to know the anatomy of the sinews, bones,
muscles and tendons so that, in their various movements and
exertions, he may know which nerve or muscle is the cause of each
movement and show those only as prominent and thickened, and not the
others all over [the limb], as many do who, to seem great
draughtsmen, draw their nude figures looking like wood, devoid of
grace; so that you would think you were looking at a sack of walnuts
rather than the human form, or a bundle of radishes rather than the
muscles of figures.

489.

The painter who is familiar with the nature of the sinews, muscles,
and tendons, will know very well, in giving movement to a limb, how
many and which sinews cause it; and which muscle, by swelling,
causes the contraction of that sinew; and which sinews, expanded
into the thinnest cartilage, surround and support the said muscle.
Thus he will variously and constantly demonstrate the different
muscles by means of the various attitudes of his figures, and will
not do, as many who, in a variety of movements, still display the
very same things [modelling] in the arms, back, breast and legs. And
these things are not to be regarded as minor faults.

How to acquire practice.

490.

I say that first you ought to learn the limbs and their mechanism,
and having this knowledge, their actions should come next, according
to the circumstances in which they occur in man. And thirdly to
compose subjects, the studies for which should be taken from natural
actions and made from time to time, as circumstances allow; and pay
attention to them in the streets and
piazze
and fields, and note
them down with a brief indication of the forms; [Footnote 5: Lines
5-7 explained by the lower portion of the sketch No. 1 on Pl. XXXI.]
thus for a head make an o, and for an arm a straight or a bent line,
and the same for the legs and the body, [Footnote 7: Lines 5-7
explained by the lower portion of the sketch No. 1 on Pl. XXXI.] and
when you return home work out these notes in a complete form. The
Adversary says that to acquire practice and do a great deal of work
it is better that the first period of study should be employed in
drawing various compositions done on paper or on walls by divers
masters, and that in this way practice is rapidly gained, and good
methods; to which I reply that the method will be good, if it is
based on works of good composition and by skilled masters. But since
such masters are so rare that there are but few of them to be found,
it is a surer way to go to natural objects, than to those which are
imitated from nature with great deterioration, and so form bad
methods; for he who can go to the fountain does not go to the
water-jar.