This is a scholarly essay (likely early 20th century, given the journal citations from 1913-1914) arguing for a "transcendental" or psychological theory of alchemy's origins. The author's central claim is that alchemical doctrine was constructed primarily through a priori reasoning grounded in mystical theology — specifically, that alchemists projected the Christian doctrine of the soul's regeneration onto the behavior of metals, treating transmutation as a material analog of spiritual transformation. The essay marshals evidence from the *Turba Philosophorum* (the oldest known Latin alchemical text) to show that the fusion of alchemy and mysticism is ancient, not a late grafting, and argues that the development of alchemical doctrine tracked the development of mystical philosophy too closely to be coincidental. A distinctive and recurring claim is that early natural phenomena were genuinely unintelligible to pre-scientific minds while theology was "the definite and generally credited branch of science" — so spiritual language was the explanatory framework projected onto matter, not the reverse. The author also engages carefully with the metaphysical question of how alchemists understood spirit and matter: neither as Cartesian opposites nor as identical, but as connected through the Hermetic axiom "as above, so below." Readers interested in the intellectual history of science, the philosophy of pre-modern thought, or the relationship between mysticism and natural inquiry will find it a dense but substantive argument.