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1. Gibbon, James. New Castle, March 10, 1809. 2. Gilmore, Robert, Jr. Baltimore, Dec. 4, 1819. 3. Gilpin, Thomas, 1776­-1853. 2 items, Phila., Sept. 29, 1810, and Chester, Jan. 17, 1818. 4. Green, Jacob, M.D., 1793­-1850. Princeton, April 3, 1818. [Acknowledges election, 2 years before, as correspondent of Academy; sends three salamanders] 5. Greville, Robert Kaye, L.L.D., 1794­-1866. Edinburgh, June 21 ­ July 1, 1824. 2 items. [Acknowledges election as correspondent of Academy] 6. Griscom, John, 1774­-1852. 2 items. New York, 2mo. 10 ­ 3mo. 17, 1816. [Discusses botanical transparencies brought from London by Charles Whitlow, which Griscom uses in lectures; introduces Prof. Valli] 7. Guillemard, J London, May 1, 1820. [Acknowledges election as correspondent of Academy]