Oat root, the simple and Pena

Meaning

The dried oat roots are the individual medicinal substance, or simple, in the final example contrasting ordinary and spagyric medicine. Nuysement says he saw the learned Pena use their decoction to relieve people afflicted with calculus. The passage alone does not securely establish Pena’s identity, and the observation remains the author’s report.

The next step is conditional, not witnessed: extracting and artfully preparing the principle that causes the effect “would give perfect cure instead of mere relief.” The distinction between soulager and donneroit garison parfaite is essential. The source does not report that Pena performed or demonstrated that perfect cure. The entry records this evidentiary difference without repeating administration directions or recommending the historical remedy.