Book,  Chapter

 1      I,  III  |      intersection of two straight lines are equal. There was never
 2     II,  XIII |     terminate,—either in straight lines which meet at discernible
 3     II,  XIII | discernible angles, or in crooked lines wherein no angles can be
 4     II,  XIII |          any bigness. So also the lines that are its sides, of what
 5     II,  XIII |      which joining again to other lines, of different lengths, and
 6     II,  XIII |           it can do with straight lines, it can also do with crooked,
 7     II,  XIII |         and the same it can do in lines, it can also in superficies;
 8     II,  XVI  |           foot or an inch; and in lines which appear of an equal
 9     II,  XVII |       pursue those indeterminable lines of number; and reckoning
10     II,  XXIX |           reduced those irregular lines on the table into their
11     II,  XXXI |         the complex idea of three lines including a space. But it
12     II,  XXXII|           a very few ideas: three lines including a space make up
13    III,  III  |   including a space between three lines, is the real as well as
14     IV,  III  |       circle, or square, drawn in lines, lies open to the view,
15     IV,  V    |          his head the idea of two lines, viz. the side and diagonal
16     IV,  XI   |      figure, which he measures by lines and angles of a diagram,
17     IV,  XI   |         of the existence of those lines and angles, which by looking
18     IV,  XII  |        remaining parts of the two lines will be equal, or that if