Optimum humidity levels are between 40% and 60% - but in any case they should be kept between 30% and 70%. Humidity levels below 40% will begin to cause problems for workers with conditions such as sinusitis.
Andrew Jackson (March 15, 1767 â June 8, 1845) was the seventh President of the United States (1829â1837).
In 1824, John Quincy Adams won neither the electoral vote nor the popular vote, losing both to Andrew Jackson. But Jackson failed to reach the 131 electoral votes needed at the time to win the presidency, so the decision went to the House of Representatives, which elected Adams.