1George F. Hopkins to Thomas Jefferson, [received 29] August 1822 (Jefferson Papers)
Hopkins, George Folliet; Observations on Electricity, Looming, and Sounds (written as “Hortensius...
2Thomas Jefferson to George F. Hopkins, 5 September 1822 (Jefferson Papers)
Hopkins, George Folliet; Observations on Electricity, Looming, and Sounds (written as “Hortensius...