Reviews Engineering Invention: Frank J. Sprague and the U.S. Electrical Industry by Frederick Dalzell Share this: Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print By Science News December 31, 2009 at 12:08 pm The inventor and entrepreneur worked for Edison before coming up with the electric railway and electric elevator.MIT Press, 2009, 288 p., $30. ENGINEERING INVENTION: FRANK J. SPRAGUE AND THE U.S. ELECTRICAL INDUSTRY BY FREDERICK DALZELL