1From Thomas Jefferson to Jonathan Williams, 15 January 1800 (Jefferson Papers)
Th: Jefferson presents his compliments & thanks to mr Williams for the copy of his Thermometrical navigation which he was so kind as to send him. he has read it, as he had done before, in another form , with great satisfaction, and has no doubt it will be of great utility to navigators. Th: J. has for some time wished he could try the thermometer daily in the river near which he lives,...