1Enclosure: David M. Randolph (ca. 1759–1830) to James Gibbon, 6 January 1822, enclosure no. 1 in Richard Randolph to … (Jefferson Papers)
The doctrine of Puzzolana is thus—“ it is an ash-powder , or rather pullverised cinders, found...
2Enclosure: David M. Randolph (ca. 1759–1830) to James Gibbon, 8 January 1822, enclosure no. 2 in Richard Randolph to … (Jefferson Papers)
I send you a bundle containing several seperate papers of powder—the one marked with Italy , is...