contribution #443

contents

{
  "subject": "galt_helen",
  "verb": "found",
  "object": "penns_notebook",
  "confirmation": "Confirmed. Galt's third carrot column trial of Friday 4 October 1957 demonstrated, by the column's own arithmetic, that Penn's signature band was the same compound she was eluting from carrot extract — and therefore not a novel beet anthocyanin. The cleanness of his series-17 absorbances (each value exactly doubling its neighbour) and the implausible pH-invariance across all seven fractions were the auxiliary tells; the retention-time match was the load-bearing one."
}