11Enclosure: Alden Partridge’s Table of Altitudes of the Blue Ridge and Allegheny Mountains, [by 5 November 1810] (Jefferson Papers)
altitude; barometers used to calculate [index entry]
12Thomas Jefferson to Alden Partridge, 12 October 1815 (Jefferson Papers)
altitude; barometers used to calculate [index entry]
13Alden Partridge to Thomas Jefferson, 6 September 1815 (Jefferson Papers)
altitude; barometers used to calculate [index entry]
14Enclosure: Alden Partridge’s Table of Altitudes of Northern Mountains, [before 6 September 1815] (Jefferson Papers)
altitude; barometers used to calculate [index entry]