Page:Lettersconcerni01conggoog.djvu/172

Rh on our Eyes from the very Boom of thoe Pores; that the maller the Pores of a Body are, the more uch a Body is tranparent. Thus Paper which reflects the Light when dry, tranmits it when oil'd, becaue the Oil, by filling its Pores, makes them much maller. there that examining the vat Poroity of Bodies, every Particle having its Pores, and every Particle of thoe Particles having its own; he hows we are not certain that there is a cubic Inch of olid Matter in the Univere, o far are we from conceiving what Matter is. Having thus divided, as it were. Light into its Elements, and carried the Sagacity of his Dicoveries o far, as to prove the Method of ditinguihing compound Colours from uch as are primitive; he hews, that thee elementary Rays eparated by the Prim, are rang'd in their Order for no other Reaon but becaue they are refracted in that very Order; and 'tis this Property (unknown till he dicover'd it) of breaking or plitting in this Proportion; 'tis this unequal Refraction of Rh