Which sprang to birth, what time, thro' lust of sway, Imperial Latium bade the world obey: 330 Fierce from the north the headlong demons flew, The wreaths of Science wither'd at their view; Plagues were their harbingers, and war accurst, And luxury, of every fiend the worst: Then did each Muse behold her triumphs fade, Then pensive Painting droop'd the languish'd head; 336 And sorrowing Sculpture, while the ruthless flame Involv'd each trophy of her sister's fame, Ornamenta modo, sæclorum et monstra malorum : 245 Meanwhile beneath the frown of angry Heaven, name, With thine, Apelles, gild the lists of fame; 250 Imperium interea, scelerum gravitate fatiscens, Hujus quando magâ velut arte æquavit Apellem 255 CHROMATICES tertia Pars Picturæ. With thine to colouring's brightest glories soar, The Gods applaud him, and the world adore. Alas! how lost those magick mixtures all! No hues of his now animate the wall; 355 How then shall modern art those hues apply, Which brings new lovers to thy sister's train, 360 Skilful at once to charm, and to retain ; Come, faithful Siren! chast seducer! say, What laws control thee, and what powers obey. 260 Pictorum archigraphum, meruitque coloribus altam 265 1 Know first, that light displays and shade destroys Refulgent Nature's variegated dyes. Thus bodies near the light distinctly shine With rays direct, and as it fades decline. 365 Thus to the eye oppos'd with stronger light They meet its orb, for distance dims the sight. Learn hence to paint the parts that meet the view In spherick forms, of bright and equal hue ; 371 Lux varium, viyumque dabit, nullum umbra, colorem. Quo magis adversum est corpus, lucique propinquum. Clarius est lumen; nam debilitatur eundo. Quo magis est corpus directum, oculisque pro pinquum, Conspicitur melius; nam visus hebescit eundo. 279 'XXXI. The conduct of "XXXI. Tonorum Lu the Tints of Light and Shadow. minum et Umbrarum ratio, Lost and confus'd progressively they fade, 375 Not fall precipitate from light to shade. This Nature dictates, and this taste pursues, Studious in gradual gloom her lights to lose; The various whole with soft'ning tints to fill, As if one single head employ'd her skill. 380 Thus if bold fancy plan some proud design, Where many various groups divide or join, (Tho' sure from more than there confusion springs,) One globe of light and shade o'er all she flings; Yet skill'd the separate masses to dispose, 385 Confusis, non præcipiti labentur in umbram Totum opus, ex multis quanquam sit partibus, unus |