Langdon Pearse

• Chicago's quest for potable water
• Eliminating pollution from the Great Lakes and St. Lawrence waterways
• Experimental engineering, particularly the construction of testing stations on water and sewage problems
• Illinois water litigation, 1940-1941
• Organization of metropolitan districts
• Sewerage System of Chicago
• The sewage problem and its relation to water supply
• The sewage testing station of the sanitary district of Chicago
• The West Side sewage treatment works of the Sanitary District of Chicago