He answer is true, hope this helps
Well I think not b/c some of the debating people can be unfair if you think about it!!
Answer:
Well based on the fact that the very first patented rock crushing machine was made in the year 1830, and the first successful, Eli Whitney Blake's, was in 1858, I'd say the development process was around 30 years.
When George Washington became president in 1789, the army he had commanded in the American Revolution had<span>(disbanded)</span>
