Book,  Paragraph

 1  VI,  3 |       eighteen eggs, and to hatch twins out of them all, except
 2  VI,  3 |            by the way, one of the twins is always bigger than the
 3  VI,  19| intercourse all their lives long.~Twins with sheep and goats may
 4  VI,  23|     occasionally however it bears twins. The ass if it cover a mare
 5 VII,  4 |           in many lands they bear twins, as for instance in Egypt
 6 VII,  4 |       other animals, if a pair of twins happen to be male and female
 7 VII,  4 |        but among mankind very few twins survive if one happen to
 8 VII,  4 |          two children like actual twins, as happened, according
 9 VII,  4 |          woman, being pregnant of twins, has subsequently conceived
10 VII,  4 |        time she brought forth the twins perfect and at full term,
11 VII,  6 |          have been known cases of twins that had no resemblance