- Aircraft hydromechanical fuel control history data courtesy of the Woodward Company.
- CIRCA 1914.
- AD FROM 1914.
- ELETRICAL WORLD, CIRCA 1914.
- ELECTRICAL WORLD VOLUME 64, CIRCA 1914.
- GENERATION PAGE 6.
- GENERATION PAGE 5.
- STURGESS WATER WHEEL GOVERNOR, CIRCA 1911.
- GENERATION PAGE 4.
- LOMBARD WATER WHEEL GOVERNOR, CIRCA 1911.
- GENERATION PAGE 3.
- GENERATION PAGE 2.
- THE ELEMENTS OF ELECTRICAL TRANSMISSION, CIRCA 1911.
- ENGINEERING MAGAZINE. MARCH 1905.
- Circa 1907.