Book,  Chapter

1        I,  VIII|  formed a right angle with the plane of the ecliptic, her various
2        I,  XX  |    always perpendicular to the plane in which it revolved) enjoyed
3       II,  III |         The inclination of the plane of the cometary orbit to
4       II,  III |      the cometary orbit to the plane of the ecliptic, an angle
5       II,  III | ellipse?”~“Yes.”~“And does its plane coincide with the plane
6       II,  III |        plane coincide with the plane of the earth?”~“Yes.”~“Then
7       II,  X   | inclination of his axis to the plane of his orbit, are each of
8       II,  X   |      which revolves in its own plane in 10 hours 32 minutes.