1Thomas Jefferson: Analysis of Weather Memorandum Book, January 1817 (Jefferson Papers)
weather; TJ’s Analysis of Weather Memorandum Book [index entry]
2Thomas Jefferson to Amos Hamlin, 1 April 1818 (Jefferson Papers)
weather; TJ’s Analysis of Weather Memorandum Book [index entry]
3Thomas Jefferson to Jacob Bigelow, 11 April 1818 (Jefferson Papers)
weather; TJ’s Analysis of Weather Memorandum Book [index entry]
4Enclosure: Thomas Jefferson’s Summary of Weather Observations, 1810–1816, [ca. 11 April 1818] (Jefferson Papers)
weather; TJ’s Analysis of Weather Memorandum Book [index entry]
5Benjamin Vaughan’s Notes on Climate Change, March 1819 (Jefferson Papers)
weather; TJ’s Analysis of Weather Memorandum Book [index entry]