Traditional wet and dry saunas use heated air to warm the body, which means they typically have to be uncomfortably hot to reach therapeutic levels. Infrared saunas, on the other hand, penetrate into tissues directly, causing the body to sweat at a more comfortable ambient temperature. Sauna Benefits. But why is it so important to sweat?
Between 1932 and 1964, quarters were 90% silver and 10% copper. These silver quarters look like any pre-state quarter 25-cent piece, but are worth a lot more if they're in the right condition.
90% silver quarters, half dollars and dimes were produced until 1964. From 1965-1970 half dollars have been 40% silver while dimes/quarters contained no silver. From 1971-pres â¦ ent no silver coins have been minted for circulation. Today the US mints various collector coins in silver, but none for general circulation.