The third eclogue of Virgil is an amoebaeum.

A moſt acute Iuuvenal, voluble and free of grace, […]

The republic of Paris will endeavour indeed to compleat the debauchery of the army, and illegally to perpetuate the assembly, without resort to its constituents

In this case, the rate of advance of the perihelia of their elliptical orbits provides important information about the masses of the neutron stars as well as providing very sensitive tests of general relativity itself.