Wallis 77 It is shown to be unsatisfactory 78 How lines and angles may be of use in computing apparent magnitudes 79 One born blind, being made to see, what judgment he would make of magnitude 80 The MINIMUM VISIBLE the same to all creatures 81 Objection answered 82 The eye at all times perceives the same number of visible points 83 Two imperfections in the VISIVE FACULTY 84 Answering to which, we may conceive two perfections 85 In neither of these two ways do microscopes improve the sight 86 The case of microscopical eyes, considered 87 The sight, admirably adapted to the ends of seeing 88 Difficulty concerning erect vision 89 The common way of explaining it 90 The same shown to be false 91 Not distinguishing between IDEAS of sight and touch, cause of mistake in this matter 92 The case of one born blind, proper to be considered 93 Such a one might by touch attain to have IDEAS of UPPER and LOWER 94 Which modes of situation he would attribute only to things tangible 95 He would not at first sight think anything he saw, high or low, erect or inverted 96 This illustrated by an example 97 By what means he would come to denominate visible OBJECTS, high or low, etc.