Arnoldo di Villanova. Rosarium Philosophorium. 1550. 

An entry into the vessel of transformation, A conjunction of the two primal archetypal forces, Their merging into an hermaphrodite in a death or nigredo stage, The extraction or ascent of one facet of the soul into the Spiritual realm (see related here), The descent of a spiritual dew or essence from above, The return of the extracted soul forces, The final formation of the Stone pictured as the resurrection of the hermaphrodite (top to bottom).