Book, Paragraph

 1   I,  1 |      forward as the reason and explanation of each subsequent step
 2   I,  5 |       to attempt to give their explanation. Many groups, as already
 3  II,  2 |       sensory impressions?~The explanation of the difficulty appears
 4  II,  7 |      more than the female. The explanation is again to be found in
 5  II,  10|        this without a rational explanation. For what is called the
 6  II,  12|     scaly plates, and the same explanation applies to them. There is
 7  II,  12|     the auditory passages. The explanation of this is that the seal,
 8 III,  1 |    said to be saw-toothed. The explanation of this latter arrangement
 9 III,  4 |     again admits of a rational explanation. For it is in these parts
10 III,  5 |    them but their vessels. The explanation of this is that the blood,
11 III,  6 | together. In this too lies the explanation of the fact that these animals
12 III,  7 |        two parts; and the same explanation applies to the heart with
13 III,  8 |      natural conformation; the explanation of the matter being that
14 III,  12|      the case, and what is the explanation, has already been stated.
15 III,  13|     placed on the outside. The explanation of this is that these parts
16 III,  14| without upper front teeth. The explanation of this is that it is more
17 III,  14|      elongated oesophagus. The explanation of this is to be found in