The period outside the quotation marks is not a copy error. For at least two centuries, it has been standard practice in the United States to place commas and periods inside of quotation marks.
A: The cotton gin was invented by Eli Whitney in 1794. It revolutionized the cotton industry in the United States but became a controversial invention as it b... Full Answer >
Eli Whitney invented the cotton gin to revolutionized the cotton industry in the United States. Prior to his invention, farming cotton required hundreds of man-hours to separa â¦ te the cottonseed from the raw cotton fibers.li Whitney invented the cotton gin to revolutionized the cotton industry in the United States. Prior to his invention, farming cotton required hundreds of man-hours to separa â¦ te the cottonseed from the raw cotton fibers.