![[SRC-126] Imperial proof and archival ingredient notation](https://images.spr.so/cdn-cgi/imagedelivery/j42No7y-dcokJuNgXeA0ig/f9faaa5a-12e7-445b-ab82-4c95c0f0f700/attachment-4c9836e8-5dbd-420f-8f7b-ee710b211b04-us_whiskey_academy/w=1920,quality=90,fit=scale-down)
Do not read Imperial proof as US proof. The syrup water quantity is absent, ingredient weight is not gallon volume, and OF is not defined. These are historical records, not modern American legal recipes.
September 8 complete supplied-PDF re-review. Source assertions and researcher checks are distinguished.
The archival formulas use Imperial proof notation, differing units and ingredients including syrup, tea, rum and Scotch.
PDF 4; printed 51
PDF 3; printed 50
Figures 4–6 and surrounding text
Located text and displayed page/figure checked in the supplied nine-page PDF. Verified means faithful source representation, not independent validation of every author assertion.
No access / 
Evidence
The archival formulas use Imperial proof notation, differing units and ingredients including syrup, tea, rum and Scotch.
Location and context
PDF 3–4; printed 50–51. Figures 4–6 and surrounding text.
Annotation
Do not read Imperial proof as US proof. The syrup water quantity is absent, ingredient weight is not gallon volume, and OF is not defined. These are historical records, not modern American legal recipes.
Citation: