- 1937-May-14 (Validated)
- 1937-Jun-01 (Registered)
Company scrip book cover issued by the American Potash & Chemical Corporation in the amount of five dollars. Stamped with validated and registered dates. Verso contains conditions for the sale of the book and where…
Plate illustrates the Tuscan landscape before the introduction of the borax industry. The foreground depicts Tuscan lagoons, where borax was found circa 1776. Steam charged with boron compounds escapes volcanic crevices…
Plate illustrates the Tuscan landscape after the establishment of the borax industry. Boric acid is collected from Tuscan lagoons via masonry structures as seen in the illustration.
This plate is from John Howard…