[DOC] [TLE] Parallel 3630 north - Wikipedia [PAR] The parallel 3630 north is a circle of latitude that is 36 and one-half degrees 
north of the equator of the Earth. This parallel of latitude is particularly significant 
in the history of the United States as the line of the Missouri Compromise, which 
was used to divide the prospective slave and free states west of the Mississippi 
River, ... In the United States, the parallel 3630 forms part of the boundary 
between... [DOC] [TLE] Missouri Compromise - Wikipedia [PAR] The Missouri Compromise was a United States federal statute devised by Henry 
Clay. It regulated slavery in the country's western territories by prohibiting the 
practice in the former Louisiana Territory north of the parallel 3630 north, 
except within the boundaries of the proposed state of ... To balance the number of 
"slave states" and "free states," the northern region... [DOC] [TLE] Missouri Compromise | HistoryNet [PAR] Northerners, most of whom favored "free states" in which slavery was ... The 
House passed his amendments, along strictly regional voting lines, but the 
Senate ... of securing the vital Mississippi River and the port of New Orleans for 
America's interests. ... north of 36 degrees 30 minutes latitude, Missouri's 
southern boundary. [DOC] [TLE] Missouri Compromise facts, information, pictures | Encyclopedia ... [PAR] Under the agreement, the territory of Missouri was admitted as a slave state, ... 
The U.S. Senate was evenly balanced between eleven slave and eleven free 
states. ... following boundaries, to wit: beginning in the middle of the Mississippi 
River, ... boundary line; thence east, from the point of intersection last aforesaid, 
along... [DOC] [TLE] Schulers Books (The United States of America Part I - 47/54) [PAR] Twenty ships-of-the-line could be built, it was said, for much less than the cost of 
.... Louisiana, the first trans-Mississippi State, was admitted with a constitution not 
... It extended indefinitely up the Missouri River and the Yellowstone, where its ... 
between slavery and free soil should be drawn along the northern boundary of... [DOC] [TLE] Mississippi's Territorial Years: A Momentous and Contentious Affair ... [PAR] In 1804, the northern boundary was extended to the Tennessee state line, and in 
1812, President James Madison annexed additional land along the Gulf of ... 
After the territory's population reached 5,000 free adult males, an assembly could 
be ... Between 1798 and 1817, the number of slaves in the Mississippi Territory... [DOC] [TLE] THE RIVER JORDAN: ALONG THE MASON-DIXON LINE, Part I [PAR] May 16, 2011 ... Although the boundary line gradually came to mark the political ... used to 
describe the borderline between free and slave states until 1820, ... also 
extended westward along the entire length of the Ohio River to its confluence 
with the Mississippi, separating Virginia and the slave state of Kentucky from free
... [DOC] [TLE] The expansion of slavery and the Missouri Compromise - North ... [PAR] And the opening of new lands in the West after 1812 greatly extended the area ... 
the Missouri Compromise to maintain the balance between slave and free states. 
... Northerners rallied to oppose Missouri's entry except as a free state, and a 
storm ... acquired by the Louisiana Purchase north of Missouri's southern 
boundary. [DOC] [TLE] The Mason Dixon Line History - Thomas' Legion [PAR] The 'Three Lower Counties' (Delaware) along Delaware Bay moved into the 
Penn ... part of this line and the Ohio River became a border between free and 
slave states, ... The surveyors also extended the boundary line to run or extend 
between ... used to designate the entire boundary between free states and slave 
states. [DOC] [TLE] Where Does the South Begin? - The Atlantic [PAR] Jan 28, 2011 ... Subscribe to the Daily, our free weekday email newsletter. ... The Mason-
Dixon Line is the most traditional border between North and South, ... Maryland 
was a slave state, home to the likes of Frederick Douglas and Harriet ... Virginia, 
along the Ohio River, and along the Baptist Line in southern Illinois.

Question: As the boundary between slave & free states, the line extended along this river to the Mississippi
Answer: Ohio River