2 in notes

plinyxadba lujvo

x₁ is a hemisphere of planet x₂ (default Earth) revolving around p₂

from plini xadba c.f. bolxadba

• jbovlaste

In notes:

bolxadba

xa₁ is a hemisphere of sphere b₁=xa₂, of material b₂, halfness standard xa₃.

plinyxabykoi

k₁ is the equator of planet x₂=p₁ (default Earth) revolving around p₂