Neptune discovery telescope. The telescope at New Berlin Observatory (1835â1913), that discovered Neptune, was an achromatic refractor of 9 Paris inch (9.6 English inches or 24.4 cm) aperture made by the late Joseph Fraunhofer's firm, Merz und Mahler.
The southern states needed these slaves because the southern states had more farms and plantations than the North did. Not everyone could afford slaves; slaves were really expensive. They were expensive to buy because they had to be feed and taken care of.
But, to the question, the Northern States didn't really want to end Slavery or the Slave Trade. That's another myth. Slavery abolition wasn't a regional issue. The North simply discovered before the South that it was cheaper to higher immigrants and sold the slaves to the South. Groups of people around the country wanted slavery to end. There were some free people all over the country at the time that wanted to end slavery and the Slave Trade. Let's not forget that the mayor of New York City at the time wanted the city to leave the Union with the South.