Before revision: Mechanical street sweeper by Joseph Whitworth, 1846 Drawing by Marguerite Martyn of children following a street-cleaning wagon in St. Louis, Missouri, 1914 Street sweeper in Paseo de la Reforma in Mexico City, 2004 upMonument of street sweeper in St. Petersburg, Russia, 2006-2009 A compact street sweeper tackles litter in Mexico City, 2007.
After revision: dispensing water to clear streets of debrisMechanical street sweeper by Joseph Whitworth, 1846 Drawing by Marguerite Martyn of children following a street-cleaning wagon in St. Louis, Missouri, 1914 Street sweeper in Paseo de la Reforma in Mexico City, 2004 upMonument of street sweeper in St. Petersburg, Russia, 2006-2009 A compact street sweeper tackles litter in Mexico City, 2007.