Silver dollars were minted for use in circulation and spending. They contained $1 worth of silver metal, about 0.77 troy ounces at the time. Silver rounds are slightly larger (one full troy ounce, usually), and are a method of collecting and/or investing in silver. Their "one dollar" denomination is artificial, and is shown only to meet legal requirements.
Round?
Other than the fact that a 1979 SBA dollar coin is about the size of a quarter, a Liberty Lobby coin is a large 1 ounce silver round with the LL logo on the reverse.
That's a one ounce silver round. At present, silver is worth about $27/ounce.
It's just a one ounce .999 silver round that's worth about $20.00.
There were no dollar coins minted in 1909. If you have a dollar coin with a 1909 date on it, it is either a fantasy coin, silver round, or most likely a Chinese counterfeit -- I have seen many of these. In any case, its value will be only for whatever silver it may contain.
The U.S. did not make any dollar coins dated 1816. From your description, it's a silver round not a genuine coin. Value is about $19.00.
The only difference is the size (diameter) of the pan.
in the fuse box : round and silver as a rule about the size of a silver dollar made of metal
All US silver dollars are round, but none are dated 1805. Please check your coin again and post a new, separate question with more information that might help to ID it.
one is normel and one is flat
What you have is a silver buillion round. As of 28 December 2013, a one ounce round is worth $20.06.
What you have is a U.S. Silver Eagle, which is a one ounce silver bullion round. As of 30 January 2014, the price of silver has been dropping, currently to $19.30 per ounce.