[ [60] See chap. ccxlviii.
[ [61] See chap. cclxxiv.
[ [62] Although the author seems to have designed that this, and many other propositions to which he refers, should have formed a part of some regular work, and he has accordingly referred to them whenever he has mentioned them, by their intended numerical situation in that work, whatever it might be, it does not appear that he ever carried this design into execution. There are, however, several chapters in the present work, viz. ccxciii. cclxxxix. cclxxxv. ccxcv. in which the principle in the text is recognised, and which probably would have been transferred into the projected treatise, if he had ever drawn it up.
[ [63] The note on the preceding chapter is in a great measure applicable to this, and the proposition mentioned in the text is also to be found in chapter ccxlvii. of the present work.
[ [64] See the note on the chapter next but one preceding. The proposition in the text occurs in chap. ccxlvii. of the present work.
[ [65] Not in this work.
[ [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.
[ [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.
[ [68] No where in this work.
[ [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.