Book, Paragraph

 1   I,  6|         rises a little above the horizon. This is the case with Mercury
 2   I,  6|         rises a little above the horizon it often fails to be seen
 3   I,  6|        circle which is above the horizon is small, and that below
 4   I,  6|        because the arc above the horizon is large and that below
 5   I,  6|          often visible above the horizon together at the same time.
 6   I,  6|  gradually fading away above the horizon; and they have not left
 7  II,  6|          drawn the circle of the horizon, which is round, but it
 8  II,  7| knowledge of the earth goes, the horizon always changes with a change
 9 III,  5|     resting on the circle of the horizon, let its centre be K and
10 III,  5|   another point appearing on the horizon. Then, if the lines that
11 III,  5|          which is cut off by the horizon will be a semi-circle; if
12 III,  5|       luminous body is above the horizon it will always be less than
13 III,  5|         body be appearing on the horizon at the point H, and let
14 III,  5|     which, MN, is cut off by the horizon. (See diagram.)~Next let
15 III,  5|       See diagram.)~Next let the horizon be ABG but let H have risen
16 III,  5|       let H have risen above the horizon. Let the axis now be HI.
17 III,  5|         circle will be below the horizon AG since the point H has
18 III,  5|      point H has risen above the horizon. But the pole, and the centre
19 III,  5|    segment YX which is above the horizon will be less than a semicircle.
20 III,  5|          now been cut off by the horizon AG. So part of it, YM, will
21 III,  5|          sun has risen above the horizon, and the segment visible
22 III,  5|          point is well below the horizon; the reason for this being