DEFINITION II.
Thomas Salusbury translation
But equally grave in Absolute Gravity, we call two Sollids, weighing equally, though of Mass they be unequall.
As for example, a Mass of Lead, and another of Wood, that weigh each ten pounds, I call equall in Absolute Gravity, though the Mass of the Wood be much greater then that of the Lead.
And, consequently, less Grave in specie.