The ideas of a quaternion and of the Philosophers’ Stone coincide with the beginnings of natural science. Alchemical speculations led to the idea of four states of aggregation, to the model of a space-time quaternion of four dimensions, and finally to different modern quaternarian models of the subatomic world.
Von Franz argues that the symbolic quaternion in alchemy directly prefigures and structurally anticipates modern scientific models of four-dimensional space-time and subatomic quaternarian structures, establishing a psychophysical homology.
, Psyche and Matter, 2014thesis