Awww. I missed Ben's 301st birthday. It was yesterday.
From his website:
Did you know that Franklin was so sure that fresh air was important for good health that he took a daily “air bath”? He wrote to the French physician, Jacques Barbeu-Dubourg, describing it thus: “I rise early almost every morning and sit in my chamber, without any clothes whatever, half an hour or an hour, according to the season, either reading or writing.”