This is Hirai's synthetic trajectory, not a single experimentally established line of technical descent. Distinguish the historical people from pseudepigraphic works and avoid reducing the history to one inventor.
English analytical paraphrase of the visually read Japanese supplied artifact; not a cleared translation.
The essay contrasts Albertus Magnus and Latin Geber's mineral/metal orientation with Roger Bacon's medical-elixir interests, then connects the latter trajectory to John of Rupescissa, pseudo-Lullian literature and later Paracelsus.
PDF 7
PDF 6
European mineral and medical trajectories
Supplied PDF 6–7 visually checked. Verified means faithful representation of the source or artifact, not independent truth of its historical claim. No exact quotation or translation cleared.
No access / Whiskey Excerpts Database (USWA)
Located analytical paraphrase; not a verbatim quotation or cleared Japanese-to-English translation.
Evidence
The essay contrasts Albertus Magnus and Latin Geber's mineral/metal orientation with Roger Bacon's medical-elixir interests, then connects the latter trajectory to John of Rupescissa, pseudo-Lullian literature and later Paracelsus.
Location and context
Supplied PDF 6–7; European mineral and medical trajectories. All eight supplied page images visually read.
No access / 
Annotation
This is Hirai's synthetic trajectory, not a single experimentally established line of technical descent. Distinguish the historical people from pseudepigraphic works and avoid reducing the history to one inventor.