Imagining living in a large, congested city, with people crammed on top of people, animals freely roaming the streets, and without any kind of facilities for disposal of the products of human and animal digestion. The odor, filth, and disease of such a place! The city of London, England, was very much like that in the middle of the 19th century. Several million people stuffed themselves into one square mile—and all human and animal waste was dumped in the filthy... Read more