Bibliography 2 "Circa 1656, A Plague Doctor In Protective Clothing. The Beak Mask Held Spices Thought To Purify Air, The Wand Was Used To Avoid Touching Patients. Original Artwork: Engraving By Paul Furst After J Colombina (Photo By Hulton Archive/Getty Images)." (n.d.): Science Image Collection. Web. 28 Apr. 2014.