Note 20 — PART I
Reading edition
Many sailing vessels were built upon the Monongahela from 1810-11. In the latter year the first steamboat was launched at Pittsburg, and sailing vessels were soon superseded.—Ed.
Reading edition
Many sailing vessels were built upon the Monongahela from 1810-11. In the latter year the first steamboat was launched at Pittsburg, and sailing vessels were soon superseded.—Ed.