chapter ccxlvii
. of the present work.]
[Footnote 64: See the note on the chapter next but one preceding. The proposition in the text occurs in chap. ccxlvii. of the present work.]
[Footnote 65: Not in this work.]
[Footnote 66: I do not know a better comment on this passage than Felibien's Examination of Le Brun's Picture of the Tent of Darius. From this (which has been reprinted with an English translation, by Colonel Parsons in 1700, in folio) it will clearly appear, what the chain of connexion is between every colour there used, and its nearest neighbour, and consequently a rule may be formed from it with more certainty and precision than where the student is left to develope it for himself, from the mere inspection of different examples of colouring.]
[Footnote 67: See chap. ccxxiii. ccxxxvii. cclxxiv. cclxxxii. of the present work. We have before remarked, that the propositions so frequently referred to by the author, were never reduced into form, though apparently he intended a regular work in which they were to be included.]
[Footnote 68: No where in this work.]
[Footnote 69: This is evident in many of Vandyke's portraits,
## particularly of ladies, many of whom are dressed in black velvet; and
this remark will in some measure account for the delicate fairness which he frequently gives to the female complexion.]
[Footnote 70: These propositions, any more than the others mentioned in different parts of this work, were never digested into a regular treatise, as was evidently intended by the author, and consequently are not to be found, except perhaps in some of the volumes of the author's manuscript collections.]
[Footnote 71: See chap. ccxciii. cccvii. cccviii.]
[Footnote 72: See chap. cclxxxvii.]
[Footnote 73: This book on perspective was never drawn up.]
[Footnote 74: See chap. ccxcii.]
[Footnote 75: See chap. ccxii. ccxlviii. cclv.]
[Footnote 76: There is no work of this author to which this can at present refer, but the principle is laid down in chapters cclxxxiv. cccvi. of the present treatise.]
[Footnote 77: See chapters cccvii. cccxxii.]
[Footnote 78: See chap. cxvi. cxxi. cccv.]
[Footnote 79: See chap. cccxiii. and cccxxiii.]
[Footnote 80: To our obtaining a correct idea of the magnitude and distance of any object seen from afar, it is necessary that we consider how much of distinctness an object loses at a distance (from the mere interposition of the air), as well as what it loses in size; and these two considerations must unite before we can decidedly pronounce as to its distance or magnitude. This calculation, as to distinctness, must be made upon the idea that the air is clear, as, if by any accident it is otherwise, we shall (knowing the proportion in which clear air dims a prospect) be led to conclude this farther off than it is, and, to justify that conclusion, shall suppose its real magnitude correspondent with the distance, at which from its degree of distinctness it appears to be. In the circumstance remarked in the text there is, however, a great deception; the fact is, that the colour and the minute parts of the object are lost in the fog, while the size of it is not diminished in proportion; and the eye being accustomed to see objects diminished in size at a great distance, supposes this to be farther off than it is, and consequently imagines it larger.]
[Footnote 81: This proposition, though undoubtedly intended to form a part of some future work, which never was drawn up, makes no part of the present.]
[Footnote 82: See chap. cccvii.]
[Footnote 83: Vide chap. ccxcii. ccciii.]
[Footnote 84: See chapter ccxcviii.]
[Footnote 85: This was probably to have been a part of some other work, but it does not occur in this.]
[Footnote 86: Cento braccia, or cubits. The Florence braccio is one foot ten inches seven eighths, English measure.]
[Footnote 87: Probably the Author here means yellow lilies, or fleurs de lis.]
[Footnote 88: That point is always found in the horizon, and is called the point of sight, or the vanishing point.]
[Footnote 89: See chap. cccxx.]
[Footnote 90: See chap. cccxvii.]
[Footnote 91: This position has been already laid down in