Book, Chapter

1    IV, 9 |        follows that a straight line from the centre of the Earth
2    IV, 9 | aforesaid number, but that the line from the surface of the
3    IV, 51|    drawn into length becomes a line, after being thus continued,
4    IV, 51|       for its extremity. And a line flowing out into breadth
5    VI, 18|        he says, is generated a line, and from a line a surface;
6    VI, 18|   generated a line, and from a line a surface; and a surface
7   VII, 11|     spaces). But the spirit, a line of demarcation between the