Reviews Engineering Invention: Frank J. Sprague and the U.S. Electrical Industry by Frederick Dalzell By Science News December 31, 2009 at 12:08 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print 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