Chap. 3. _That the Colour of Bodies depends chiefly on the disposition of the Superficial parts, and partly upon the Variety of the Texture of the Object_ (21.) _The former of these are confirm'd by several Persons_ (22.) _and two Instances, the first of the Steel mention'd before, the second of melted Lead_ (23, 24.) _of which last several Observables are noted_ (25.) _A third Instance is added of the Porousness of the appearing smooth Surface of Cork_ (26, 27.) _And that the same kind of Porousness may be also in the other Colour'd Bodies; And of what kind of Figures, the Superficial reflecting Particles of them may be_ (28.) _and of what Bulks, and closeness of Position_ (29.) _How much these may conduce to the Generation of Colour instanc'd in the Whiteness of Froth, and in the mixtures of Dry colour'd Powders_ (30.) _A further explication of the Variety that may be in the Superficial parts of Colour'd Bodies, that may cause that Effect, by an example drawn from the Surface of the Earth_ (31.) _An Apology for that gross Comparison_ (32.) _That the appearances of the Superficial asperities may be Varied from the position of the Eye, and several Instances given of such appearances_ (33, 34, 35.) _That the appearance of the Superficial particles may be Varied also by their Motion, confirm'd by an Instance of the smoaking Liquor_ (35.) _especially if the Superficial parts be of such a Nature as to appear divers in several Postures, explain'd by the variety of Colours exhibited by the shaken Leaves of some Plants_ (36.) _and by changeable Taffities_ (37, 38, 39.) _The Authors wish that the Variety of Colours in Mother of Pearl were examin'd with a_ Microscope (40.) _And his Conjectures, that possibly good_ Microscopes _might discover those Superficial inequalities to be Real, which we now only imagine with his reasons drawn partly from the Discoveries of the_ Telescope, _and_ Microscope (41.) _And partly also from the Prodigiously strange example of a Blind man that could feel Colours_ (42.) _whose History is Related_ (43, 44, 45.) _The Authors conjecture and thoughts of it_ (46, 47, 48, 49.) _and several Conclusions and Corollaries drawn from it about the Nature of Blackness and Black Bodies_ (50, 51, 52.) _and about the Asperities of several other Colour'd Bodies_ (53.) _And from these, and some premis'd Considerations, are propos'd some Conjectures; That the reason of the several Phænomena of Colours, afterwards to be met with, depends upon the Disposition of the Seen parts of the Object_ (54.) _That Liquors may alter the Colours of each other, and of other Bodies, first by their Insinuating themselves into the Pores, and filling them, whence the Asperity of the Surface of a Body becomes alter'd, explicated with some Instances_ (55, 56.) _Next by removing those Bodies, which before hindred the appearance of the Genuine Colour, confirm'd by several examples_ (57) _Thirdly, by making a Fissure or Separation either in the