Just glancing at the article, it struck me how similar this picture from the article is: http://pop.h-cdn.co/assets/15/35/1440426015-desalinization-2.jpg http:/

Just glancing at the article, it struck me how similar this picture from the article is: http://pop.h-cdn.co/assets/15/35/1440426015-desalinization-2.jpg http://pop.h-cdn.co/assets/15/35/1440426015-desalinization-2... To an 1880's Ogden cigarettes card demonstrating how to make an emergency filter inside of a bucket: http://digitalcollections.nypl.org/items/510d47da-d09a-a3d9-e040-e00a18064a99 http://digitalcollections.nypl.org/items/510d47da-d09a-a3d9-... 150 years later, and the method is pretty much identical.