Download or read book Letter to Mons. Dubourg, 28 July 1768 : on the Free Use of Air. From: Memoirs of the Life and Writings of Benjamin Franklin ... written by Benjamin Franklin and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Benjamin Franklin writes from London to Monsieur Dubourg in reply to the latter's remarks about a new method of treating smallpox. Franklin does not like the cold water bath which was then in vogue. He describes instead his own practice of sitting naked in his room every morning for 30-60 minutes after awakening in order to "bathe" in the cold air. Of this air bath, Franklin writes that "at least it does not injure my health, if it does not in fact contribute much to its preservation."