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.
The rising price of silver spelled doom for its use in circulating coinage after the mid 1960s. The dimes and quarters dated 1967 were produced in both the normal .800 fine silver and in a reduced .500 silver. The latter continued into 1968 for these two coins, but a non-silver composition was phased in that year.