""Report To Samuel H. Ashbridge, Mayor Of The City Of Philadelphia, On The Extension And Improvement Of The Water Supply Of The City Of Philadelphia (1899)"" is a detailed report written by Rudolph Hering, a prominent civil engineer, on the extension and improvement of the water supply system in the city of Philadelphia. The report was commissioned by the then-mayor of Philadelphia, Samuel H. Ashbridge, in order to address the growing concerns about...