The History of Morgan silver dollars 

The Morgan Dollar was minted from 1878 to 1904 with one reissue in 1921, and it was struck at five U.S. Mints: Carson City, Philadelphia, San Francisco, New Orleans, and Denver. The coin came to life after the largest silver strike in the world: the 1859 Comstock Lode, which was a large silver deposit in Nevada, named after Henry Comstock, who was a part-owner of the property where it was discovered in June 1859. The lode resulted in a huge flood of silver to the market. However, in 1873, The Coinage Act put an end to the manufacture of silver coins in the United States as values dropped. The Bland-Allison Act made silver legal tender alive again in 1878, requiring the U.S. Treasury to purchase a certain amount of silver and minting 2 million silver dollars per month. This is when the Morgan Silver dollar started being produced until the year 1904.