- The squamosals form the posterior outer margin of the
**orbits**and are frequently continued into two lateral downward processes across the temporal fossa. - In this way we account most simply for the uniformity in the direction in which the planets revolve, and for the mutual proximity of the planes in which their
**orbits**are contained. - Elliptic
**orbits**, and a parabolic orbit considered as the special case when the eccentricity of the ellipse is 1, are almost the only ones the astronomer has to consider, and our attention will therefore be confined to them in the present article. - The modern method of determining
**orbits**from three or four observations was first developed by C. F. - No post-orbital processes or any separation between
**orbits**and temporal fossae.

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