
The provided search results are not relevant to the question and do not contain the information needed to determine how many silver dollars make an ounce of silver.
Based on general knowledge, the answer depends on which U.S. silver dollar is being referenced. For the common and Peace silver dollars, which were minted for circulation before 1935, the composition is 90% silver and 10% copper. The total weight of one of these coins is 26.73 grams.
Because the coin is 90% silver, its actual silver weight (ASW) is approximately 24.05 grams, which is equivalent to about 0.7734 troy ounces. The troy ounce is the standard unit of measurement for precious metals.
Therefore, to obtain one full troy ounce of pure silver, you would need approximately 1.3 silver dollars (1 divided by 0.7734). In practical terms, two of these silver dollars would contain slightly more than 1.5 troy ounces of silver.


