class="pginternal" tag="{http://www.w3.org/1999/xhtml}a">The opinion of Dr. 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.   98   Why he should think those OBJECTS highest, which are painted on the lowest part of his eye, and VICE VERSA   99   How he would perceive by sight, the situation of external objects  100   Our propension to think the contrary, no argument against what has been said  101   Objection  102   Answer  103   An object could not be known at first sight by the colour  104   Nor by the magnitude thereof  105   Nor by the figure  106   In the first act of vision, no tangible thing would be suggested by sight  107   Difficulty proposed concerning number  108   Number of things visible, would not at first sight suggest the like number of things tangible  109   Number the creature of the mind  110   One born blind would not at first sight number visible things as others do  111   The situation of any object determined with respect only to objects of the same sense  112   No distance, great or small, between a visible and tangible thing  113   The not observing this, cause of difficulty in erect vision  114   Which otherwise includes nothing unaccountable  115   public@vhost@g@gutenberg@html@files@4722@[email protected]#sect115"