Do not use a nonunique chemical marker as sole provenance evidence; historical Mexican standards are not current US rules.
Critical reading/evidence map, not a quotation or endorsement of every source claim. Chapter 4 reviewed in full; detailed discussion and locators in the linked Literature Note.
Chapter 4 process and compositional discussion, PDF 138–165; Figs. 4.1–4.2 and Table 4.1 inspected at PDF 145, 146 and 154. PDF 143 methanol unit and PDF 153 ethanol-output notation require correction.
165
138
Chapter 4; PDF 138–165, printed 113 onward
Sequential full-copy reading and relevant visual inspection completed September28–29,2026. Locators are supplied-PDF sheet numbers; underlying bibliography papers not all independently read.
Evidence and interpretation
Chapter4 process and compositional discussion PDF138–165; Figs. 4.1–4.2 and Table4.1 inspected at145,146,154. PDF143 methanol unit and PDF153 ethanol-output notation require correction.
Limits and proposed Academy use
Do not use a nonunique chemical marker as sole provenance evidence; historical Mexican standards are not current US rules.
Detailed provenance
This is a researcher audit of chapter 4, PDF 138–165; it is not a verbatim excerpt. Findings are bounded to the supplied 2019 edition. No public lesson placement is asserted.