How much silver is in a 50 cent piece before 1964?

Which trade did both the French and British colonists want control over? When did Lewis and Clark come across the three forks? Who was the abolitionist that advised Lincoln to end slavery? How did the settlement of Kansas and Nebraska bring out conflict between the north and south? What is the value of a 1921 silver dollar with the word peace under the eagle? The stated that Native Americans had to move west of the Mississippi? Who is John winthrope? Why did Jefferson write this letter to Lewis and Clark? What is the highest denomination of coin ever minted for circulation? Where was the first large-scale nuclear test site in the us? When was slavery founded? What Indian tribe was the most brutal? Where did the south concede to the north? Who helped the slaves be free? Which presidential candidate won Michigan in 1860? What is the value of a 1939 Liberty nickel? What one major primary document from the Civil War? What items could serve as a primary source for a historian studying the American civial war? Is there a list of the states and the year they became part of the United States? What does a 1916 U.S. dime look like?