1Amos Hamlin to Thomas Jefferson, 12 January 1818 (Jefferson Papers)
I have taken the liberty of sending to You, the result of some Meteorological observations which...
2Enclosure: Amos Hamlin’s Meteorological Observations, [by 12 January 1818] (Jefferson Papers)
Meteorological observations made at Durham, Greene County New York in Lat. 42° 28′ N for the...