University of Virginia Library

In training

In order to acquire "a greater familiarity with the technical
language of the natural sciences, and readiness in the astronomical
observations necessary for the geography of
his route," Lewis proceeded to Philadelphia,[11] where
he received instruction in the rudiments of the sciences from


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Page xxvii
several eminent specialists—that city being the home of the
American Philosophical Society, and then the principal seat of
learning in the country. His correspondence with Jefferson
during this period, which is given in our Appendix, abounds
in allusions to scientific and practical details, showing him to
have been not only an apt pupil, but already possessed of a
large fund of information of the sort essential to the equipment
of an explorer.

 
[11]

Jefferson's Memoir of Lewis does not mention that Lewis went to Philadelphia
as early as July, 1802; but his letter to Lewis, dated January 22d, 1803 (see
Appendix), indicates that such was the fact.