Two conventions were held in 1830, both of which issued a revision of Pharmacopoeia.
Vols. for 1830- called [1st]- revision.
Supplement
The 11th revision has two supplements; the 12th- revisions have "bound" supplements.
Issued By
Issued by authority of the United States Pharmacopoeial Convention, 1820-1975 under its following names: 1820, General Medical Convention; Jan. 1830, National Medical Convention; June 1830, General Convention for the Formation of the American Pharmacopoeia; 1840-50, National Medical Convention; 1860-90, National Convention for Revising the Pharmacopoeia; 1900-75, United States Pharmacopoeial Convention.