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of towns (465—469).—The effect of wind on trees (470—473).—Light and shade on clouds (474—477).—On images reflected in water (478).—Of rainbows and rain (479. 480).—Of flower seeds (481).

IX.

THE PRACTICE OF PAINTING

I. MORAL PRECEPTS FOR THE STUDENT OF PAINTING.—How to ascertain the dispositions for an artistic career (482).—The course of instruction for an artist (483—485).—The study of the antique (486. 487).—The necessity of anatomical knowledge (488. 489).—How to acquire practice (490).—Industry and thoroughness the first conditions (491—493.)—The artist’s private life and choice of company (493. 494).—The distribution of time for studying (495— 497).—On the productive power of minor artists (498—501).—A caution against one-sided study (502).—How to acquire universality (503—506).—Useful games and exercises (507. 508).—II. THE ARTIST’S STUDIO.—INSTRUMENTS AND HELPS FOR THE APPLICATION OF PERSPECTIVE.—ON JUDGING OF A PICTURE.—On the size of the studio (509).—On the construction of windows (510—512).—On the best light for painting (513—520).—On various helps in preparing a picture (521—530).—On the management of works (531. 532).—On the limitations of painting (533—535).—On the choice of a position (536. 537).—The apparent size of figures in a picture (538. 539).—The right position of the artist, when painting and of the spectator (540—547).—III. THE PRACTICAL METHODS OF LIGHT AND SHADE AND AERIAL PERSPECTIVE.—Gradations of light and shade (548).—On the choice of light for a picture (549—554).—The distribution of light and shade (555—559).—The juxtaposition of light and shade (560. 561).—On the lighting of the background (562—565).—On the lighting of white objects (566).—The methods of aerial perspective (567—570).—IV. OF PORTRAIT AND FIGURE PAINTING.—Of sketching figures and portraits (571. 572).—The position of the head (573).—Of the light on the face (574—576).—General suggestions for historical pictures (577—581).—How to represent the differences of age and sex (582. 583).—Of representing the emotions (584).—Of representing imaginary animals (585).—The selection of forms (586—591).—How to pose figures (592).—Of appropriate gestures (593—600).—V. SUGGESTIONS FOR COMPOSITIONS.—Of painting battle-pieces (601—603).—Of depicting night-scenes (604).—Of depicting a tempest (605. 606).—Of representing the deluge (607—609).—Of depicting natural phenomena (610. 611).—VI. THE ARTIST’S MATERIALS.—Of chalk and paper (612—617).—On the preparation and use of colours (618—627).—Of preparing the panel (628).—The preparation of oils (629—634).—On varnishes (635— 637).—On chemical _materials (638—650).—VII. PHILOSOPHY AND HISTORY OF THE ART OF PAINTING.—The relation of art and nature (651. 652).—Painting is superior to poetry (653. 654).—Painting is superior to sculpture (655. 656).—Aphorisms (657—659).—On the history of painting (660. 661).—The painter’s scope (662).

X.

STUDIES AND SKETCHES FOR PICTURES AND DECORATIONS

On pictures of the Madonna (663).—Bernardo di Bandino’s portrait (664).—Notes on the Last Supper (665—668).—On the battle of Anghiari (669).—Allegorical representations referring to the duke of Milan (670—673).—Allegorical representations (674—678).—Arrangement of a picture (679).—List of drawings (680).—Mottoes and Emblems (681—702).

 

The author’s intention to publish his MSS.

 

1.

 

How by a certain machine many may stay some time under water. And how and wherefore I do not describe my method of remaining under water and how long I can remain without eating. And I do not publish nor divulge these, by reason of the evil nature of men, who would use them for assassinations at the bottom of the sea by destroying ships, and sinking them, together with the men in them. Nevertheless I will impart others, which are not dangerous because the mouth of the tube through which you breathe is above the water, supported on air sacks or cork.

[Footnote: The leaf on which this passage is written, is headed with the words _Casi_ 39, and most of these cases begin with the word ‘Come‘, like the two here given, which are the 26th and 27th. 7. Sughero. In the Codex Antlanticus 377a; 1170a there is a sketch, drawn with the pen, representing a man with a tube in his mouth, and at the farther end of the tube a disk. By the tube the word ‘Channa‘ is written, and by the disk the word ‘sughero‘.]

The preparation of the MSS. for publication.

 

2.

 

When you put together the science of the motions of water, remember to include under each proposition its application and use, in order that this science may not be useless.—

[Footnote: A comparatively small portion of Leonardo’s notes on water-power was published at Bologna in 1828, under the title: “Del moto e misura dell’Acqua, di L. da Vinci“.]

Admonition to readers.

 

3.

 

Let no man who is not a Mathematician read the elements of my work.

The disorder in the MSS.

 

4.

 

Begun at Florence, in the house of Piero di Braccio Martelli, on the 22nd day of March 1508. And this is to be a collection without order, taken from many papers which I have copied here, hoping to arrange them later each in its place, according to the subjects of which they may treat. But I believe that before I am at the end of this [task] I shall have to repeat the same things several times; for which, O reader! do not blame me, for the subjects are many and memory cannot retain them [all] and say: ‘I will not write this because I wrote it before.’ And if I wished to avoid falling into this fault, it would be necessary in every case when I wanted to copy [a passage] that, not to repeat myself, I should read over all that had gone before; and all the more since the intervals are long between one time of writing and the next.

[Footnote: 1. In the history of Florence in the early part of the XVIth century Piero di Braccio Martelli is frequently mentioned as Commissario della Signoria. He was famous for his learning and at his death left four books on Mathematics ready for the press; comp. LITTA, Famiglie celebri Italiane, Famiglia Martelli di Firenze.—In the Official Catalogue of MSS. in the Brit. Mus., New Series Vol. I., where this passage is printed, Barto has been wrongly given for Braccio.

2. addi 22 di marzo 1508. The Christian era was computed in Florence at that time from the Incarnation (Lady day, March 25th). Hence this should be 1509 by our reckoning.

3. racolto tratto di molte carte le quali io ho qui copiate. We must suppose that Leonardo means that he has copied out his own MSS. and not those of others. The first thirteen leaves of the MS. in the Brit. Mus. are a fair copy of some notes on physics.]

Suggestions for the arrangement of MSS treating of particular subjects.(5-8).

 

5.

 

Of digging a canal. Put this in the Book of useful inventions and in proving them bring forward the propositions already proved. And this is the proper order; since if you wished to show the usefulness of any plan you would be obliged again to devise new machines to prove its utility and thus would confuse the order of the forty Books and also the order of the diagrams; that is to say you would have to mix up practice with theory, which would produce a confused and incoherent work.

 

6.

 

I am not to blame for putting forward, in the course of my work on science, any general rule derived from a previous conclusion.

 

7.

 

The Book of the science of Mechanics must precede the Book of useful inventions.—Have your books on anatomy bound! [Footnote: 4. The numerous notes on anatomy written on loose leaves and now in the Royal collection at Windsor can best be classified in four Books, corresponding to the different character and size of the paper. When Leonardo speaks of ‘li tua libri di notomia‘, he probably means the MSS. which still exist; if this hypothesis is correct the present condition of these leaves might seem to prove that he only carried out his purpose with one of the Books on anatomy. A borrowed book on Anatomy is mentioned in F.O.]

 

8.

 

The order of your book must proceed on this plan: first simple beams, then (those) supported from below, then suspended in part, then wholly [suspended]. Then beams as supporting other weights [Footnote: 4. Leonardo’s notes on Mechanics are extraordinarily numerous; but, for the reasons assigned in my introduction, they have not been included in the present work.].

General introductions to the book on Painting (9-13).

 

9.

 

INTRODUCTION.

Seeing that I can find no subject specially useful or pleasing—since the men who have come before me have taken for their own every useful or necessary theme—I must do like one who, being poor, comes last to the fair, and can find no other way of providing himself than by taking all the things already seen by other buyers, and not taken but refused by reason of their lesser value. I, then, will load my humble pack with this despised and rejected merchandise, the refuse of so many buyers; and will go about to distribute it, not indeed in great cities, but in the poorer towns, taking such a price as the wares I offer may be worth. [Footnote: It need hardly be pointed out that there is in this ‘Proemio’ a covert irony. In the second and third prefaces, Leonardo characterises his rivals and opponents more closely. His protest is directed against Neo-latinism as professed by most of the humanists of his time; its futility is now no longer questioned.]

 

10.

 

INTRODUCTION.

I know that many will call this useless work [Footnote: 3. questa essere opera inutile. By opera we must here understand libro di pittura and particularly the treatise on Perspective.]; and they will be those of whom Demetrius [Footnote: 4. Demetrio. “With regard to the passage attributed to Demetrius”, Dr. H. M�LLER STR�BING writes, “I know not what to make of it. It is certainly not Demetrius Phalereus that is meant and it can hardly be Demetrius Poliorcetes. Who then can it be—for the name is a very common one? It may be a clerical error for Demades and the maxim is quite in the spirit of his writings I have not however been able to find any corresponding passage either in the ‘Fragments’ (C. MULLER, Orat. Att., II. 441) nor in the Supplements collected by DIETZ (_Rhein. Mus._, vol. 29, p. 108).”

The same passage occurs as a simple Memorandum in the MS. Tr. 57, apparently as a note for this ‘Proemio‘ thus affording some data as to the time where these introductions were written.] declared that he took no more account of the wind that came out their mouth in words, than of that they expelled from their lower parts: men who desire nothing but material riches and are absolutely devoid of that of wisdom, which is the food and the only true riches of the mind. For so much more worthy as the soul is than the body, so much more noble are the possessions of the soul than those of the body. And often, when I see one of these men take this work in his hand, I wonder that he does not put it to his nose, like a monkey, or ask me if it is something good to eat.

[Footnote: In the original, the Proemio d� prospettiva cio� dell’uffitio dell’occhio (see No. 21) stands between this and the preceding one, No. 9.]

INTRODUCTION.

I am fully concious that, not being a literary man, certain presumptuous persons will think that they may reasonably blame me; alleging that I am not a man of letters. Foolish folks! do they not know that I might retort as Marius did to the Roman Patricians [Footnote 21: Come Mario disse ai patriti Romani. “I am unable to find the words here attributed by Leonardo to Marius, either in Plutarch’s Life of Marius or in the Apophthegmata (_Moralia_, p.202). Nor do they occur in the writings of Valerius Maximus (who frequently mentions Marius) nor in Velleius Paterculus (II, 11 to 43), Dio Cassius, Aulus Gellius, or Macrobius. Professor E. MENDELSON of Dorpat, the editor

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