Pharmaceutical Preparation Vocabulary and Cross-Section Connectivity in Voynich Manuscript Folio 58r

Folio 58r of the Voynich Manuscript occupies the boundary position between the herbal section (f1r-f57v) and the balneological section (f75r-f84v). This folio has been variously interpreted as a pharmaceutical index, an astronomical chart, or a patient entry selector. We present a falsification-tested analysis of f58r's vocabulary class distribution and cross-section connectivity that is consistent with a pharmaceutical preparation bridge interpretation. The s-class (Honeycutt Ai Labs corridor-attested gloss star-s=syrupus) is one of three co-dominant line-opener classes alongside y- and d-; the lattice's high-signal cross-section anchor block for f58r lists otaly, otal, and okaiin anchors, with otal chip-annotated as routing to balneological f75v.50 and pharma f99v.27, and ary and ytar reported as multi-section cross-section operators in the line bodies. Of four prespecified falsification tests, the corridor-attestation test (T2) passes within-substrate; the class-distribution (T1), connectivity (T3), and comparator (T4) tests are reported as consistent-with the preparation bridge interpretation and do not constitute strict falsification of the competing patient-constitution-selector hypothesis at the token level. The comparator's top match against the Cgm 7958 master-alphabet volvelle apparatus is reported as one factor consistent with a routing-node reading. f58r's vocabulary profile is consistent with a function specifying the pharmaceutical preparation method (syrup, decoction, soak, oil class) for plant-derived substances at the point of transition from botanical reference to balneological application - a preparation bridge reading consistent with the court physician reference systems of the 15th century iatromathematical manuscript tradition.