books.google.co.uk - Snow expanded his reports on his cholera research in a book entitled On the Mode of Communication of Cholera published in London the same year. That book contained more statistical data confirming his theories. Over the next five years Snow continued his research, publishing a second edition of the book...http://books.google.co.uk/books/about/On_the_Mode_of_Communication_of_Cholera.html?id=-N0_AAAAcAAJ&utm_source=gb-gplus-shareOn the Mode of Communication of Cholera
