Philadelphia Chapter: Lewis and Clark Trail, Andrew Ellicott: Astronomer...mathematician...surveyor
http://www.lewisandclarkphila.org/philadelphia/philadelphiaellicott.ht...
Referenced in:
Andrew Ellicott (1754-1820)
Philadelphia Chapter: Lewis and Clark Trail, Andrew Ellicott: Astronomer...mathematician...surveyor
http://www.lewisandclarkphila.org/philadelphia/philadelphiaellicott.ht...
Referenced in:
Andrew Ellicott (1754-1820)