In all these cases the primum mobile is the making of a livelihood.
This was believed to turn all the others, and was called the primum mobile.
The equinoctial was supposed to revolve, because it was the 'girdle' of the primum mobile, and turned with it.
I need not say that your correspondent is quite right in referring the words first moved to the primum mobile.
“Hellgate” is now the orifice in the primum mobile towards the empyrean.
Hostility to the foreigner is the primum mobile of their local policy.
Here it clearly refers to the primum mobile; it often applies to the whole expanse of the heavens.
The primum mobile of the new system was Motion, in distinction from the Rest which marked the old monastic retreats.
Who can trace out the hidden cause; the "primum mobile" of the Ptolmaic philosophy—the secret spring of motion?
The heaven, etc.: The primum mobile; but used here for the highest heaven.